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annotate libinterp/corefcn/rand.cc @ 28823:26cfccfee9a0

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Replace unwind_protect with more efficient constructs (bug #59192). * debug.cc, error.cc, ft-text-renderer.cc, load-path.cc, mex.cc, oct-hist.cc, pager.cc, rand.cc, strfns.cc, sysdep.cc, toplev.cc, variables.cc, __delaunayn__.cc, __voronoi__.cc, audiodevinfo.cc, audioread.cc, convhulln.cc, ov-class.cc, ov-struct.cc: Remove unwind_protect frames declared but never used. Replace frame.protect_var () instances with unwind_protect_var<> object. Replace frame.add_fcn () instances with unwind_action<> object.
author Rik <rik@octave.org>
date Wed, 30 Sep 2020 03:17:52 -0700
parents 98192ec1621f
children 445e5ac1f58d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
27923
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1 /////////////////////////////////////////////////////////////////////////*
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2 //
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3 // Copyright (C) 1996-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include <ctime>
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31 #include <unordered_map>
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32 #include <string>
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33
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34 #include "f77-fcn.h"
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35 #include "lo-mappers.h"
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36 #include "oct-rand.h"
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37 #include "quit.h"
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38
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39 #include "defun.h"
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40 #include "error.h"
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41 #include "errwarn.h"
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42 #include "ovl.h"
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43 #include "unwind-prot.h"
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44 #include "utils.h"
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45 #include "ov-re-mat.h"
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46
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47 /*
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48 %% Restore all rand* "seed" and "state" values in order, so that the
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49 %% new "state" algorithm remains active after these tests complete.
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50 %!function restore_rand_states (seed, state)
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51 %! rand ("seed", seed.rand);
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52 %! rande ("seed", seed.rande);
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53 %! randg ("seed", seed.randg);
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54 %! randn ("seed", seed.randn);
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55 %! randp ("seed", seed.randp);
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56 %! rand ("state", state.rand);
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57 %! rande ("state", state.rande);
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58 %! randg ("state", state.randg);
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59 %! randn ("state", state.randn);
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60 %! randp ("state", state.randp);
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61 %!endfunction
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62
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63 %!shared __random_statistical_tests__, old_seed, old_state, restore_state
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64 %! ## Flag whether the statistical tests should be run in "make check" or not
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65 %! __random_statistical_tests__ = 0;
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66 %! ## Save and restore the states of each of the random number generators
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67 %! ## that are tested by the unit tests in this file.
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68 %! old_seed.rand = rand ("seed");
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69 %! old_seed.rande = rande ("seed");
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70 %! old_seed.randg = randg ("seed");
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71 %! old_seed.randn = randn ("seed");
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72 %! old_seed.randp = randp ("seed");
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73 %! old_state.rand = rand ("state");
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74 %! old_state.rande = rande ("state");
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75 %! old_state.randg = randg ("state");
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76 %! old_state.randn = randn ("state");
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77 %! old_state.randp = randp ("state");
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78 %! restore_state = onCleanup (@() restore_rand_states (old_seed, old_state));
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79 */
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80
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81 static octave_value
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82 do_rand (const octave_value_list& args, int nargin, const char *fcn,
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83 const std::string& distribution, bool additional_arg = false)
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84 {
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85 NDArray a;
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86 int idx = 0;
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87 bool is_single = false;
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88
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89 if (nargin > 0 && args(nargin-1).is_string ())
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90 {
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91 std::string s_arg = args(nargin-1).string_value ();
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92
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93 if (s_arg == "single")
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94 {
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95 is_single = true;
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96 nargin--;
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97 }
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98 else if (s_arg == "double")
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99 nargin--;
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100 }
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101
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102 if (additional_arg)
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103 {
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104 if (nargin == 0)
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105 error ("%s: at least one argument is required", fcn);
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106 else if (args(0).is_string ())
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107 additional_arg = false;
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108 else
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109 {
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110 a = args(0).xarray_value ("%s: dimension must be a scalar integer", fcn);
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111
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112 idx++;
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113 nargin--;
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114 }
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115 }
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116
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117 octave_value retval;
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118 dim_vector dims;
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119
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120 // Restore current distribution on any exit.
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121 octave::unwind_action restore_distribution
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122 ([] (const auto& old_distribution)
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123 {
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124 octave::rand::distribution (old_distribution);
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125 }, octave::rand::distribution ());
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126
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127 octave::rand::distribution (distribution);
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128
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129 switch (nargin)
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130 {
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131 case 0:
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132 {
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133 if (additional_arg)
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134 dims = a.dims ();
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John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
135 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
136 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
137 dims.resize (2);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
138
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
139 dims(0) = 1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
140 dims(1) = 1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
141 }
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
142
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
143 goto gen_matrix;
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
144 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
145 break;
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
146
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
147 case 1:
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
148 {
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
149 octave_value tmp = args(idx);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
150
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
151 if (tmp.is_string ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
152 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
153 std::string s_arg = tmp.string_value ();
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
154
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
155 if (s_arg == "dist")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
156 retval = octave::rand::distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
157 else if (s_arg == "seed")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
158 retval = octave::rand::seed ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
159 else if (s_arg == "state" || s_arg == "twister")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
160 retval = octave::rand::state (fcn);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
161 else if (s_arg == "uniform")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
162 octave::rand::uniform_distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
163 else if (s_arg == "normal")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
164 octave::rand::normal_distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
165 else if (s_arg == "exponential")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
166 octave::rand::exponential_distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
167 else if (s_arg == "poisson")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
168 octave::rand::poisson_distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
169 else if (s_arg == "gamma")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
170 octave::rand::gamma_distribution ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
171 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
172 error ("%s: unrecognized string argument", fcn);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
173 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
174 else if (tmp.is_scalar_type ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
175 {
27249
84cdeeaf0dce Accept only integers for single input form of rand (bug #56609).
Rik <rik@octave.org>
parents: 26376
diff changeset
176 octave_idx_type n = tmp.idx_type_value (true);
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
177
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
178 dims.resize (2);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
179
27249
84cdeeaf0dce Accept only integers for single input form of rand (bug #56609).
Rik <rik@octave.org>
parents: 26376
diff changeset
180 dims(0) = dims(1) = n;
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
181
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
182 goto gen_matrix;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
183 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
184 else if (tmp.is_range ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
185 {
28638
98192ec1621f replace Range with range<double>
John W. Eaton <jwe@octave.org>
parents: 28636
diff changeset
186 octave::range<double> r = tmp.range_value ();
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
187
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
188 if (! r.all_elements_are_ints ())
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
189 error ("%s: all elements of range must be integers", fcn);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
190
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
191 octave_idx_type n = r.numel ();
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
192
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
193 dims.resize (n);
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
194
21782
2aef506f3fec use namespace for lo-mappers.h functions
John W. Eaton <jwe@octave.org>
parents: 21743
diff changeset
195 octave_idx_type base = octave::math::nint_big (r.base ());
28636
a3db48e66ef8 use Range::increment instead of Range::inc
John W. Eaton <jwe@octave.org>
parents: 28598
diff changeset
196 octave_idx_type incr = octave::math::nint_big (r.increment ());
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
197
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
198 for (octave_idx_type i = 0; i < n; i++)
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
199 {
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
200 // Negative dimensions treated as zero for Matlab compatibility
23450
855122b993da maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
parents: 23220
diff changeset
201 dims(i) = (base >= 0 ? base : 0);
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
202 base += incr;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
203 }
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
204
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
205 goto gen_matrix;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
206 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
207 else if (tmp.is_matrix_type ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
208 {
25927
d6581134daaa Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension in a dimension vector (bug #54781).
Rik <rik@octave.org>
parents: 25926
diff changeset
209 Array<octave_idx_type> iv;
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
210
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
211 try
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
212 {
25927
d6581134daaa Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension in a dimension vector (bug #54781).
Rik <rik@octave.org>
parents: 25926
diff changeset
213 iv = tmp.octave_idx_type_vector_value (true);
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
214 }
22327
d0562b3159c7 move more classes inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 22323
diff changeset
215 catch (octave::execution_exception& e)
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
216 {
20756
200ae1d650b7 propagate octave_execution_exception objects through try/catch blocks
John W. Eaton <jwe@octave.org>
parents: 20743
diff changeset
217 error (e, "%s: dimensions must be a scalar or array of integers", fcn);
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
218 }
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
219
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
220 octave_idx_type len = iv.numel ();
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
221
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
222 dims.resize (len);
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
223
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
224 for (octave_idx_type i = 0; i < len; i++)
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
225 {
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
226 // Negative dimensions treated as zero for Matlab compatibility
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
227 octave_idx_type elt = iv(i);
23450
855122b993da maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
parents: 23220
diff changeset
228 dims(i) = (elt >=0 ? elt : 0);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
229 }
20743
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
230
b6408331bfa2 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20711
diff changeset
231 goto gen_matrix;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
232 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
233 else
21129
228b65504557 maint: Eliminate useless statements after err_XXX.
Rik <rik@octave.org>
parents: 21127
diff changeset
234 err_wrong_type_arg ("rand", tmp);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
235 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
236 break;
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
237
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
238 default:
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
239 {
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
240 octave_value tmp = args(idx);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
241
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
242 if (nargin == 2 && tmp.is_string ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
243 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
244 std::string ts = tmp.string_value ();
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents: 4665
diff changeset
245
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
246 if (ts == "seed")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
247 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
248 if (args(idx+1).is_real_scalar ())
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
249 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
250 double d = args(idx+1).double_value ();
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
251
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
252 octave::rand::seed (d);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
253 }
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
254 else if (args(idx+1).is_string ()
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14706
diff changeset
255 && args(idx+1).string_value () == "reset")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
256 octave::rand::reset ();
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
257 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
258 error ("%s: seed must be a real scalar", fcn);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
259 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
260 else if (ts == "state" || ts == "twister")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
261 {
10709
92a85ed5b86e Don't special case color_property type when emitting factory default (bug #30118)
David Bateman <dbateman@free.fr>
parents: 10687
diff changeset
262 if (args(idx+1).is_string ()
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14706
diff changeset
263 && args(idx+1).string_value () == "reset")
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
264 octave::rand::reset (fcn);
10709
92a85ed5b86e Don't special case color_property type when emitting factory default (bug #30118)
David Bateman <dbateman@free.fr>
parents: 10687
diff changeset
265 else
92a85ed5b86e Don't special case color_property type when emitting factory default (bug #30118)
David Bateman <dbateman@free.fr>
parents: 10687
diff changeset
266 {
27277
db687716fed6 style fixes: generally aim to break long lines before operators, not after
John W. Eaton <jwe@octave.org>
parents: 27249
diff changeset
267 ColumnVector s
db687716fed6 style fixes: generally aim to break long lines before operators, not after
John W. Eaton <jwe@octave.org>
parents: 27249
diff changeset
268 = ColumnVector (args(idx+1).vector_value (false, true));
25946
85f499b88c43 maint: Strip trailing whitespace from source files.
John W. Eaton <jwe@octave.org>
parents: 25651
diff changeset
269
25651
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
270 // Backwards compatibility with previous versions of
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
271 // Octave which mapped Inf to 0.
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
272 for (octave_idx_type i = 0; i < s.numel (); i++)
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
273 if (octave::math::isinf (s.xelem (i)))
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
274 s.xelem (i) = 0.0;
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
275
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
276 octave::rand::state (s, fcn);
10709
92a85ed5b86e Don't special case color_property type when emitting factory default (bug #30118)
David Bateman <dbateman@free.fr>
parents: 10687
diff changeset
277 }
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
278 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
279 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
280 error ("%s: unrecognized string argument", fcn);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
281 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
282 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
283 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
284 dims.resize (nargin);
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
285
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
286 for (int i = 0; i < nargin; i++)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
287 {
25926
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
288 octave_idx_type elt = args(idx+i).idx_type_value (true);
20704
571508c1ed06 eliminate more uses of error_state
John W. Eaton <jwe@octave.org>
parents: 20687
diff changeset
289
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
290 // Negative dimensions treated as zero for Matlab compatibility
23450
855122b993da maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
parents: 23220
diff changeset
291 dims(i) = (elt >= 0 ? elt : 0);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
292 }
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
293
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
294 goto gen_matrix;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
295 }
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
296 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4307
diff changeset
297 break;
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
298 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
299
21170
1edaf1ee65eb maint: Replace some uses of goto in libinterp.
Rik <rik@octave.org>
parents: 21129
diff changeset
300 // No "goto gen_matrix" in code path. Must be done processing.
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
301 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
302
17787
175b392e91fe Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents: 17744
diff changeset
303 gen_matrix:
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
304
5355
cf44c749ba52 [project @ 2005-05-18 11:43:37 by jwe]
jwe
parents: 5307
diff changeset
305 dims.chop_trailing_singletons ();
cf44c749ba52 [project @ 2005-05-18 11:43:37 by jwe]
jwe
parents: 5307
diff changeset
306
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
307 if (is_single)
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
308 {
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
309 if (additional_arg)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
310 {
20232
a9574e3c6e9e Deprecate Array::length() and Sparse::length() in favour of ::numel().
Carnë Draug <carandraug@octave.org>
parents: 20228
diff changeset
311 if (a.numel () == 1)
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
312 return octave::rand::float_nd_array (dims, a(0));
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
313 else
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
314 {
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14706
diff changeset
315 if (a.dims () != dims)
20831
35241c4b696c eliminate return statements after calls to error
John W. Eaton <jwe@octave.org>
parents: 20801
diff changeset
316 error ("%s: mismatch in argument size", fcn);
35241c4b696c eliminate return statements after calls to error
John W. Eaton <jwe@octave.org>
parents: 20801
diff changeset
317
20232
a9574e3c6e9e Deprecate Array::length() and Sparse::length() in favour of ::numel().
Carnë Draug <carandraug@octave.org>
parents: 20228
diff changeset
318 octave_idx_type len = a.numel ();
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
319 FloatNDArray m (dims);
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
320 float *v = m.fortran_vec ();
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
321
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
322 for (octave_idx_type i = 0; i < len; i++)
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
323 v[i] = octave::rand::float_scalar (a(i));
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
324
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
325 return m;
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
326 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 10066
diff changeset
327 }
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
328 else
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
329 return octave::rand::float_nd_array (dims);
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
330 }
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
331 else
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
332 {
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
333 if (additional_arg)
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
334 {
20232
a9574e3c6e9e Deprecate Array::length() and Sparse::length() in favour of ::numel().
Carnë Draug <carandraug@octave.org>
parents: 20228
diff changeset
335 if (a.numel () == 1)
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
336 return octave::rand::nd_array (dims, a(0));
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
337 else
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
338 {
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14706
diff changeset
339 if (a.dims () != dims)
20831
35241c4b696c eliminate return statements after calls to error
John W. Eaton <jwe@octave.org>
parents: 20801
diff changeset
340 error ("%s: mismatch in argument size", fcn);
35241c4b696c eliminate return statements after calls to error
John W. Eaton <jwe@octave.org>
parents: 20801
diff changeset
341
20232
a9574e3c6e9e Deprecate Array::length() and Sparse::length() in favour of ::numel().
Carnë Draug <carandraug@octave.org>
parents: 20228
diff changeset
342 octave_idx_type len = a.numel ();
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
343 NDArray m (dims);
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
344 double *v = m.fortran_vec ();
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
345
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
346 for (octave_idx_type i = 0; i < len; i++)
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
347 v[i] = octave::rand::scalar (a(i));
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
348
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
349 return m;
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
350 }
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
351 }
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
352 else
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
353 return octave::rand::nd_array (dims);
14655
43db83eff9db Implement single precision rand, randn, rande, randg and randp generators (bug #34351, #36293)
David Bateman <dbateman@free.fr>
parents: 14620
diff changeset
354 }
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
355 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
356
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
357 DEFUN (rand, args, ,
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
358 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
359 @deftypefn {} {} rand (@var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
360 @deftypefnx {} {} rand (@var{m}, @var{n}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
361 @deftypefnx {} {} rand ([@var{m} @var{n} @dots{}])
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
362 @deftypefnx {} {@var{v} =} rand ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
363 @deftypefnx {} {} rand ("state", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
364 @deftypefnx {} {} rand ("state", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
365 @deftypefnx {} {@var{v} =} rand ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
366 @deftypefnx {} {} rand ("seed", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
367 @deftypefnx {} {} rand ("seed", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
368 @deftypefnx {} {} rand (@dots{}, "single")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
369 @deftypefnx {} {} rand (@dots{}, "double")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
370 Return a matrix with random elements uniformly distributed on the
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
371 interval (0, 1).
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
372
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
373 The arguments are handled the same as the arguments for @code{eye}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
374
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
375 You can query the state of the random number generator using the form
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
376
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
377 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
378 v = rand ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
379 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
380
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
381 This returns a column vector @var{v} of length 625. Later, you can restore
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
382 the random number generator to the state @var{v} using the form
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
383
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
384 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
385 rand ("state", v)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
386 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
387
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
388 @noindent
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
389 You may also initialize the state vector from an arbitrary vector of length
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
390 @leq{} 625 for @var{v}. This new state will be a hash based on the value of
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
391 @var{v}, not @var{v} itself.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
392
28598
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
393 By default, the generator is initialized by contributing entropy from the
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
394 wall clock time, the CPU time, the current fraction of a second, the process
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
395 ID and---if available---up to 1024 bits from the C++ random numbers source
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
396 @code{random_device}, which might be non-deterministic (implementation
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
397 specific). Note that this differs from @sc{matlab}, which always initializes
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
398 the state to the same state at startup. To obtain behavior comparable to
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
399 @sc{matlab}, initialize with a deterministic state vector in Octave's startup
43c285a20829 Update documentation of the random number generator (bug #58800).
Markus Meisinger <chloros2@gmx.de>
parents: 27923
diff changeset
400 files (@pxref{Startup Files}).
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
401
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
402 To compute the pseudo-random sequence, @code{rand} uses the Mersenne
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
403 Twister with a period of @math{2^{19937}-1}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
404 (See @nospell{M. Matsumoto and T. Nishimura},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
405 @cite{Mersenne Twister: A 623-dimensionally equidistributed uniform
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
406 pseudorandom number generator},
27800
5a6a19a4e3da doc: Use Texinfo non-sentence ending periods in citations.
Rik <rik@octave.org>
parents: 27277
diff changeset
407 @nospell{ACM} Trans.@: on Modeling and Computer Simulation Vol.@: 8, No.@: 1,
5a6a19a4e3da doc: Use Texinfo non-sentence ending periods in citations.
Rik <rik@octave.org>
parents: 27277
diff changeset
408 pp.@: 3--30, January 1998,
21966
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parents: 21942
diff changeset
409 @url{http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html}).
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
410 Do @strong{not} use for cryptography without securely hashing several
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
411 returned values together, otherwise the generator state can be learned after
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
412 reading 624 consecutive values.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
413
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
414 Older versions of Octave used a different random number generator.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
415 The new generator is used by default as it is significantly faster than the
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
416 old generator, and produces random numbers with a significantly longer cycle
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
417 time. However, in some circumstances it might be desirable to obtain the
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
418 same random sequences as produced by the old generators. To do this the
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
419 keyword @qcode{"seed"} is used to specify that the old generators should
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
420 be used, as in
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
421
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
422 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
423 rand ("seed", val)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
424 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
425
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
426 @noindent
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
427 which sets the seed of the generator to @var{val}. The seed of the
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
428 generator can be queried with
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
429
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
430 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
431 s = rand ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
432 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
433
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
434 However, it should be noted that querying the seed will not cause
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
435 @code{rand} to use the old generators, only setting the seed will. To cause
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
436 @code{rand} to once again use the new generators, the keyword
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
437 @qcode{"state"} should be used to reset the state of the @code{rand}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
438
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
439 The state or seed of the generator can be reset to a new random value using
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
440 the @qcode{"reset"} keyword.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
441
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
442 The class of the value returned can be controlled by a trailing
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
443 @qcode{"double"} or @qcode{"single"} argument. These are the only valid
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
444 classes.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
445 @seealso{randn, rande, randg, randp}
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parents: 21942
diff changeset
446 @end deftypefn */)
2928
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parents:
diff changeset
447 {
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
448 return do_rand (args, args.length (), "rand", "uniform");
2928
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jwe
parents:
diff changeset
449 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
450
17787
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Rik <rik@octave.org>
parents: 17744
diff changeset
451 // FIXME: The old generator (selected when "seed" is set) will not
8871
fb1c929dbbb7 tests vs. 64-bit indexing
John W. Eaton <jwe@octave.org>
parents: 8828
diff changeset
452 // work properly if compiled to use 64-bit integers.
fb1c929dbbb7 tests vs. 64-bit indexing
John W. Eaton <jwe@octave.org>
parents: 8828
diff changeset
453
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parents: 5355
diff changeset
454 /*
14501
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parents: 14138
diff changeset
455 %!test # "state" can be a scalar
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
456 %! rand ("state", 12); x = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
457 %! rand ("state", 12); y = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
458 %! assert (x, y);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
459 %!test # "state" can be a vector
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
460 %! rand ("state", [12,13]); x = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
461 %! rand ("state", [12;13]); y = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
462 %! assert (x, y);
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8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
463 %!test # querying "state" returns a value which can be used later
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
464 %! s = rand ("state"); x = rand (1,2);
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
465 %! rand ("state", s); y = rand (1,2);
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
466 %! assert (x, y);
14501
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
467 %!test # querying "state" doesn't disturb sequence
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
468 %! rand ("state", 12); rand (1,2); x = rand (1,2);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
469 %! rand ("state", 12); rand (1,2); s = rand ("state"); y = rand (1,2);
14501
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
470 %! assert (x, y);
24816
261d23b8933b test: ensure all unit tests restore global random state after setting it
Mike Miller <mtmiller@octave.org>
parents: 24106
diff changeset
471 %! rand ("state", s); z = rand (1,2);
14501
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
472 %! assert (x, z);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
473 %!test # "seed" must be a scalar
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
474 %! rand ("seed", 12); x = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
475 %! rand ("seed", 12); y = rand (1,4);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
476 %! assert (x, y);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
477 %!error <seed must be a real scalar> rand ("seed", [12,13])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
478 %!test # querying "seed" returns a value which can be used later
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
479 %! s = rand ("seed"); x = rand (1,2);
24816
261d23b8933b test: ensure all unit tests restore global random state after setting it
Mike Miller <mtmiller@octave.org>
parents: 24106
diff changeset
480 %! rand ("seed", s); y = rand (1,2);
14501
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
481 %! assert (x, y);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
482 %!test # querying "seed" doesn't disturb sequence
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
483 %! rand ("seed", 12); rand (1,2); x = rand (1,2);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
484 %! rand ("seed", 12); rand (1,2); s = rand ("seed"); y = rand (1,2);
14501
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
485 %! assert (x, y);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
486 %! rand ("seed", s); z = rand (1,2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
487 %! assert (x, z);
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diff changeset
488 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
489
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
490 /*
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
491 %!test
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parents: 24817
diff changeset
492 %! ## Test a known fixed state
14501
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parents: 14138
diff changeset
493 %! rand ("state", 1);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
494 %! assert (rand (1,6), [0.1343642441124013 0.8474337369372327 0.763774618976614 0.2550690257394218 0.495435087091941 0.4494910647887382], eps);
6437
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dbateman
parents: 6198
diff changeset
495 %!test
24856
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Rik <rik@octave.org>
parents: 24817
diff changeset
496 %! ## Test a known fixed seed
14501
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parents: 14138
diff changeset
497 %! rand ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
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parents: 14138
diff changeset
498 %! assert (rand (1,6), [0.8668024251237512 0.9126510815694928 0.09366085007786751 0.1664607301354408 0.7408077004365623 0.7615650338120759], 1e-6);
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diff changeset
499 %!test
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dbateman
parents: 6198
diff changeset
500 %! if (__random_statistical_tests__)
17336
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parents: 17281
diff changeset
501 %! ## statistical tests may fail occasionally.
14501
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parents: 14138
diff changeset
502 %! rand ("state", 12);
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8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
503 %! x = rand (100_000, 1);
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
504 %! assert (min (x) > 0); #*** Please report this!!! ***
14501
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diff changeset
505 %! assert (max (x) < 1); #*** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
506 %! assert (mean (x), 0.5, 0.0024);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
507 %! assert (var (x), 1/48, 0.0632);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
508 %! assert (skewness (x), 0, 0.012);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
509 %! assert (kurtosis (x), -6/5, 0.0094);
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diff changeset
510 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
511 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
512 %! if (__random_statistical_tests__)
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parents: 17281
diff changeset
513 %! ## statistical tests may fail occasionally.
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parents: 14138
diff changeset
514 %! rand ("seed", 12);
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Rik <rik@octave.org>
parents: 24817
diff changeset
515 %! x = rand (100_000, 1);
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parents: 14138
diff changeset
516 %! assert (max (x) < 1); #*** Please report this!!! ***
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parents: 14138
diff changeset
517 %! assert (min (x) > 0); #*** Please report this!!! ***
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parents: 14138
diff changeset
518 %! assert (mean (x), 0.5, 0.0024);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
519 %! assert (var (x), 1/48, 0.0632);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
520 %! assert (skewness (x), 0, 0.012);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
521 %! assert (kurtosis (x), -6/5, 0.0094);
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diff changeset
522 %! endif
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diff changeset
523 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
524
17258
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Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
525 /*
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
526 ## Test out-of-range values as rand() seeds.
17258
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
527 %!function v = __rand_sample__ (initval)
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
528 %! rand ("state", initval);
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
529 %! v = rand (1, 6);
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
530 %!endfunction
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
531 %!
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
532 %!assert (__rand_sample__ (-1), __rand_sample__ (0))
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
533 %!assert (__rand_sample__ (-Inf), __rand_sample__ (0))
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
534 %!assert (__rand_sample__ (2^33), __rand_sample__ (intmax ("uint32")))
25651
c759aa39c23a Produce same random number stream for "state" initialized to Inf (bug #54342).
Rik <rik@octave.org>
parents: 25143
diff changeset
535 %!assert (__rand_sample__ (Inf), __rand_sample__ (0))
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
536 %!assert (__rand_sample__ (NaN), __rand_sample__ (0))
17258
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Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
537 */
213ee68b59da Handle out-of-range values consistently when initializing random number generator.
Philipp Kutin <philipp.kutin@gmail.com>
parents: 15195
diff changeset
538
25926
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
539 /*
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
540 ## Check that negative dimensions are treated as zero for Matlab compatibility
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
541 %!assert (size (rand (1, -1, 2)), [1, 0, 2])
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
542
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
543 ## Test input validation
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
544 %!error <conversion of 1.1 to.* failed> rand (1, 1.1)
25927
d6581134daaa Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension in a dimension vector (bug #54781).
Rik <rik@octave.org>
parents: 25926
diff changeset
545 %!error <dimensions must be .* array of integers> rand ([1, 1.1])
25926
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
546 */
373fe1608f7c Emit an error when utility matrices (zeros, ones, rand, etc.) are given a fractional dimension (bug #54781).
Rik <rik@octave.org>
parents: 25828
diff changeset
547
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
548 static std::string current_distribution = octave::rand::distribution ();
4307
fd034cd46aea [project @ 2003-01-24 19:20:50 by jwe]
jwe
parents: 4153
diff changeset
549
15039
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Rik <rik@octave.org>
parents: 14854
diff changeset
550 DEFUN (randn, args, ,
21966
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John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
551 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
552 @deftypefn {} {} randn (@var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
553 @deftypefnx {} {} randn (@var{m}, @var{n}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
554 @deftypefnx {} {} randn ([@var{m} @var{n} @dots{}])
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
555 @deftypefnx {} {@var{v} =} randn ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
556 @deftypefnx {} {} randn ("state", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
557 @deftypefnx {} {} randn ("state", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
558 @deftypefnx {} {@var{v} =} randn ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
559 @deftypefnx {} {} randn ("seed", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
560 @deftypefnx {} {} randn ("seed", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
561 @deftypefnx {} {} randn (@dots{}, "single")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
562 @deftypefnx {} {} randn (@dots{}, "double")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
563 Return a matrix with normally distributed random elements having zero mean
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
564 and variance one.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
565
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
566 The arguments are handled the same as the arguments for @code{rand}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
567
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
568 By default, @code{randn} uses the @nospell{Marsaglia and Tsang}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
569 ``Ziggurat technique'' to transform from a uniform to a normal distribution.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
570
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
571 The class of the value returned can be controlled by a trailing
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
572 @qcode{"double"} or @qcode{"single"} argument. These are the only valid
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
573 classes.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
574
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
575 Reference: @nospell{G. Marsaglia and W.W. Tsang},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
576 @cite{Ziggurat Method for Generating Random Variables},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
577 J. Statistical Software, vol 5, 2000,
25143
13fd0610480f doc: Use https whenever possible in @url entries.
Rik <rik@octave.org>
parents: 25054
diff changeset
578 @url{https://www.jstatsoft.org/v05/i08/}
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
579
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
580 @seealso{rand, rande, randg, randp}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
581 @end deftypefn */)
2928
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jwe
parents:
diff changeset
582 {
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
583 return do_rand (args, args.length (), "randn", "normal");
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
584 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
585
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
586 /*
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
587 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
588 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
589 %! randn ("state", 1);
24989
15d2f32db174 test: relax tolerances on randn, randg tests to pass on i386 (bug #53438)
Mike Miller <mtmiller@octave.org>
parents: 24856
diff changeset
590 %! assert (randn (1, 6), [-2.666521678978671 -0.7381719971724564 1.507903992673601 0.6019427189162239 -0.450661261143348 -0.7054431351574116], 14*eps);
6437
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dbateman
parents: 6198
diff changeset
591 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
592 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
593 %! randn ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
594 %! assert (randn (1, 6), [-1.039402365684509 -1.25938892364502 0.1968704611063004 0.3874166905879974 -0.5976632833480835 -0.6615074276924133], 1e-6);
5730
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jwe
parents: 5355
diff changeset
595 %!test
6437
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dbateman
parents: 6198
diff changeset
596 %! if (__random_statistical_tests__)
17336
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Rik <rik@octave.org>
parents: 17281
diff changeset
597 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
598 %! randn ("state", 12);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
599 %! x = randn (100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
600 %! assert (mean (x), 0, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
601 %! assert (var (x), 1, 0.02);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
602 %! assert (skewness (x), 0, 0.02);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
603 %! assert (kurtosis (x), 0, 0.04);
6437
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dbateman
parents: 6198
diff changeset
604 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
605 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
606 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
607 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
608 %! randn ("seed", 12);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
609 %! x = randn (100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
610 %! assert (mean (x), 0, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
611 %! assert (var (x), 1, 0.02);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
612 %! assert (skewness (x), 0, 0.02);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
613 %! assert (kurtosis (x), 0, 0.04);
6437
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dbateman
parents: 6198
diff changeset
614 %! endif
5730
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parents: 5355
diff changeset
615 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
616
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
617 DEFUN (rande, args, ,
21966
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parents: 21942
diff changeset
618 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
619 @deftypefn {} {} rande (@var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
620 @deftypefnx {} {} rande (@var{m}, @var{n}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
621 @deftypefnx {} {} rande ([@var{m} @var{n} @dots{}])
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
622 @deftypefnx {} {@var{v} =} rande ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
623 @deftypefnx {} {} rande ("state", @var{v})
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diff changeset
624 @deftypefnx {} {} rande ("state", "reset")
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parents: 21942
diff changeset
625 @deftypefnx {} {@var{v} =} rande ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
626 @deftypefnx {} {} rande ("seed", @var{v})
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parents: 21942
diff changeset
627 @deftypefnx {} {} rande ("seed", "reset")
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parents: 21942
diff changeset
628 @deftypefnx {} {} rande (@dots{}, "single")
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parents: 21942
diff changeset
629 @deftypefnx {} {} rande (@dots{}, "double")
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John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
630 Return a matrix with exponentially distributed random elements.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
631
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
632 The arguments are handled the same as the arguments for @code{rand}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
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diff changeset
633
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
634 By default, @code{rande} uses the @nospell{Marsaglia and Tsang}
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
635 ``Ziggurat technique'' to transform from a uniform to an exponential
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
636 distribution.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
637
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
638 The class of the value returned can be controlled by a trailing
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
639 @qcode{"double"} or @qcode{"single"} argument. These are the only valid
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
640 classes.
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
641
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
642 Reference: @nospell{G. Marsaglia and W.W. Tsang},
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
643 @cite{Ziggurat Method for Generating Random Variables},
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
644 J. Statistical Software, vol 5, 2000,
25143
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Rik <rik@octave.org>
parents: 25054
diff changeset
645 @url{https://www.jstatsoft.org/v05/i08/}
21966
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parents: 21942
diff changeset
646
112b20240c87 move docstrings in C++ files out of C strings and into comments
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parents: 21942
diff changeset
647 @seealso{rand, randn, randg, randp}
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diff changeset
648 @end deftypefn */)
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diff changeset
649 {
20894
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parents: 20853
diff changeset
650 return do_rand (args, args.length (), "rande", "exponential");
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parents: 5355
diff changeset
651 }
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
652
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
653 /*
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
654 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
655 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
656 %! rande ("state", 1);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
657 %! assert (rande (1, 6), [3.602973885835625 0.1386190677555021 0.6743112889616958 0.4512830847258422 0.7255744741233175 0.3415969205292291], 2*eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
658 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
659 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
660 %! rande ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
661 %! assert (rande (1, 6), [0.06492075175653866 1.717980206012726 0.4816154008731246 0.5231300676241517 0.103910739364359 1.668931916356087], 1e-6);
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
662 %!test
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
663 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
664 %! ## statistical tests may fail occasionally
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
665 %! rande ("state", 1);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
666 %! x = rande (100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
667 %! assert (min (x) > 0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
668 %! assert (mean (x), 1, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
669 %! assert (var (x), 1, 0.03);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
670 %! assert (skewness (x), 2, 0.06);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
671 %! assert (kurtosis (x), 6, 0.7);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
672 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
673 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
674 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
675 %! ## statistical tests may fail occasionally
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
676 %! rande ("seed", 1);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
677 %! x = rande (100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
678 %! assert (min (x)>0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
679 %! assert (mean (x), 1, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
680 %! assert (var (x), 1, 0.03);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
681 %! assert (skewness (x), 2, 0.06);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
682 %! assert (kurtosis (x), 6, 0.7);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
683 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
684 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
685
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
686 DEFUN (randg, args, ,
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
687 doc: /* -*- texinfo -*-
24106
a6cf8e06603a doc: Correct documentation for randg (bug #52118).
Rik <rik@octave.org>
parents: 23219
diff changeset
688 @deftypefn {} {} randg (@var{a}, @var{n})
a6cf8e06603a doc: Correct documentation for randg (bug #52118).
Rik <rik@octave.org>
parents: 23219
diff changeset
689 @deftypefnx {} {} randg (@var{a}, @var{m}, @var{n}, @dots{})
a6cf8e06603a doc: Correct documentation for randg (bug #52118).
Rik <rik@octave.org>
parents: 23219
diff changeset
690 @deftypefnx {} {} randg (@var{a}, [@var{m} @var{n} @dots{}])
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
691 @deftypefnx {} {@var{v} =} randg ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
692 @deftypefnx {} {} randg ("state", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
693 @deftypefnx {} {} randg ("state", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
694 @deftypefnx {} {@var{v} =} randg ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
695 @deftypefnx {} {} randg ("seed", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
696 @deftypefnx {} {} randg ("seed", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
697 @deftypefnx {} {} randg (@dots{}, "single")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
698 @deftypefnx {} {} randg (@dots{}, "double")
24106
a6cf8e06603a doc: Correct documentation for randg (bug #52118).
Rik <rik@octave.org>
parents: 23219
diff changeset
699
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
700 Return a matrix with @code{gamma (@var{a},1)} distributed random elements.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
701
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
702 The arguments are handled the same as the arguments for @code{rand}, except
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
703 for the argument @var{a}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
704
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
705 This can be used to generate many distributions:
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
706
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
707 @table @asis
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
708 @item @code{gamma (a, b)} for @code{a > -1}, @code{b > 0}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
709
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
710 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
711 r = b * randg (a)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
712 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
713
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
714 @item @code{beta (a, b)} for @code{a > -1}, @code{b > -1}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
715
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
716 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
717 @group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
718 r1 = randg (a, 1)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
719 r = r1 / (r1 + randg (b, 1))
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
720 @end group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
721 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
722
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
723 @item @code{Erlang (a, n)}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
724
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
725 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
726 r = a * randg (n)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
727 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
728
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
729 @item @code{chisq (df)} for @code{df > 0}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
730
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
731 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
732 r = 2 * randg (df / 2)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
733 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
734
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
735 @item @code{t (df)} for @code{0 < df < inf} (use randn if df is infinite)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
736
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
737 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
738 r = randn () / sqrt (2 * randg (df / 2) / df)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
739 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
740
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
741 @item @code{F (n1, n2)} for @code{0 < n1}, @code{0 < n2}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
742
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
743 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
744 @group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
745 ## r1 equals 1 if n1 is infinite
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
746 r1 = 2 * randg (n1 / 2) / n1
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
747 ## r2 equals 1 if n2 is infinite
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
748 r2 = 2 * randg (n2 / 2) / n2
21968
973db845cb43 doc: Remove stray '\n' from docstrings.
Rik <rik@octave.org>
parents: 21966
diff changeset
749 r = r1 / r2
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
750 @end group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
751 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
752
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
753 @item negative @code{binomial (n, p)} for @code{n > 0}, @code{0 < p <= 1}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
754
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
755 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
756 r = randp ((1 - p) / p * randg (n))
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
757 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
758
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
759 @item non-central @code{chisq (df, L)}, for @code{df >= 0} and @code{L > 0}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
760 (use chisq if @code{L = 0})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
761
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
762 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
763 @group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
764 r = randp (L / 2)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
765 r(r > 0) = 2 * randg (r(r > 0))
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
766 r(df > 0) += 2 * randg (df(df > 0)/2)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
767 @end group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
768 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
769
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
770 @item @code{Dirichlet (a1, @dots{} ak)}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
771
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
772 @example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
773 @group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
774 r = (randg (a1), @dots{}, randg (ak))
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
775 r = r / sum (r)
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
776 @end group
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
777 @end example
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
778
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
779 @end table
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
780
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
781 The class of the value returned can be controlled by a trailing
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
782 @qcode{"double"} or @qcode{"single"} argument. These are the only valid
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
783 classes.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
784 @seealso{rand, randn, rande, randp}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
785 @end deftypefn */)
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
786 {
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
787 int nargin = args.length ();
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
788
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
789 if (nargin < 1)
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
790 error ("randg: insufficient arguments");
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
791
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
792 return do_rand (args, nargin, "randg", "gamma", true);
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
793 }
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
794
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
795 /*
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
796 %!test
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
797 %! randg ("state", 12);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
798 %! assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]); # *** Please report
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
799
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
800 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
801 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
802 %! randg ("state", 1);
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
803 %! assert (randg (0.1, 1, 6), [0.0103951513331241 8.335671459898252e-05 0.00138691397249762 0.000587308416993855 0.495590518784736 2.3921917414795e-12], eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
804 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
805 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
806 %! randg ("state", 1);
24989
15d2f32db174 test: relax tolerances on randn, randg tests to pass on i386 (bug #53438)
Mike Miller <mtmiller@octave.org>
parents: 24856
diff changeset
807 %! assert (randg (0.95, 1, 6), [3.099382433255327 0.3974529788871218 0.644367450750855 1.143261091802246 1.964111762696822 0.04011915547957939], 12*eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
808 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
809 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
810 %! randg ("state", 1);
24989
15d2f32db174 test: relax tolerances on randn, randg tests to pass on i386 (bug #53438)
Mike Miller <mtmiller@octave.org>
parents: 24856
diff changeset
811 %! assert (randg (1, 1, 6), [0.2273389379645993 1.288822625058359 0.2406335209340746 1.218869553370733 1.024649860162554 0.09631230343599533], 40*eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
812 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
813 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
814 %! randg ("state", 1);
24989
15d2f32db174 test: relax tolerances on randn, randg tests to pass on i386 (bug #53438)
Mike Miller <mtmiller@octave.org>
parents: 24856
diff changeset
815 %! assert (randg (10, 1, 6), [3.520369644331133 15.15369864472106 8.332112081991205 8.406211067432674 11.81193475187611 10.88792728177059], 56*eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
816 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
817 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
818 %! randg ("state", 1);
24989
15d2f32db174 test: relax tolerances on randn, randg tests to pass on i386 (bug #53438)
Mike Miller <mtmiller@octave.org>
parents: 24856
diff changeset
819 %! assert (randg (100, 1, 6), [75.34570255262264 115.4911985594699 95.23493031356388 95.48926019250911 106.2397448229803 103.4813150404118], 256*eps);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
820 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
821 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
822 %! randg ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
823 %! assert (randg (0.1, 1, 6), [0.07144210487604141 0.460641473531723 0.4749028384685516 0.06823389977216721 0.000293838675133884 1.802567535340305e-12], 1e-6);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
824 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
825 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
826 %! randg ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
827 %! assert (randg (0.95, 1, 6), [1.664905071258545 1.879976987838745 1.905677795410156 0.9948706030845642 0.5606933236122131 0.0766092911362648], 1e-6);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
828 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
829 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
830 %! randg ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
831 %! assert (randg (1, 1, 6), [0.03512085229158401 0.6488978862762451 0.8114678859710693 0.1666885763406754 1.60791552066803 1.90356981754303], 1e-6);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
832 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
833 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
834 %! randg ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
835 %! assert (randg (10, 1, 6), [6.566435813903809 10.11648464202881 10.73162078857422 7.747178077697754 6.278522491455078 6.240195751190186], 1e-5);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
836 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
837 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
838 %! randg ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
839 %! assert (randg (100, 1, 6), [89.40208435058594 101.4734725952148 103.4020004272461 93.62763214111328 88.33104705810547 88.1871337890625], 1e-4);
18573
53ba52143af7 Fix dead assignment in oct-rand.cc do_float_scalar (bug #41827).
Branden Archer <b.m.archer4@gmail.com>
parents: 18436
diff changeset
840 %!test
53ba52143af7 Fix dead assignment in oct-rand.cc do_float_scalar (bug #41827).
Branden Archer <b.m.archer4@gmail.com>
parents: 18436
diff changeset
841 %! ## Test out-of-bounds values produce NaN w/old-style generators & floats
53ba52143af7 Fix dead assignment in oct-rand.cc do_float_scalar (bug #41827).
Branden Archer <b.m.archer4@gmail.com>
parents: 18436
diff changeset
842 %! randg ("seed", 1);
53ba52143af7 Fix dead assignment in oct-rand.cc do_float_scalar (bug #41827).
Branden Archer <b.m.archer4@gmail.com>
parents: 18436
diff changeset
843 %! result = randg ([-2 Inf], "single");
18574
756e906bdfda Fix %!test comparing NaN (single) to NaN (double) in cset 53ba52143af7.
Rik <rik@octave.org>
parents: 18573
diff changeset
844 %! assert (result, single ([NaN NaN]));
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
845
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
846 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
847 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
848 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
849 %! randg ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
850 %! a = 0.1;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
851 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
852 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
853 %! assert (var (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
854 %! assert (skewness (x), 2/sqrt (a), 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
855 %! assert (kurtosis (x), 6/a, 50);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
856 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
857 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
858 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
859 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
860 %! randg ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
861 %! a = 0.95;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
862 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
863 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
864 %! assert (var (x), a, 0.04);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
865 %! assert (skewness (x), 2/sqrt (a), 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
866 %! assert (kurtosis (x), 6/a, 2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
867 %! endif
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
868 %!test
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
869 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
870 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
871 %! randg ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
872 %! a = 1;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
873 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
874 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
875 %! assert (var (x), a, 0.04);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
876 %! assert (skewness (x), 2/sqrt (a), 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
877 %! assert (kurtosis (x), 6/a, 2);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
878 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
879 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
880 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
881 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
882 %! randg ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
883 %! a = 10;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
884 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
885 %! assert (mean (x), a, 0.1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
886 %! assert (var (x), a, 0.5);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
887 %! assert (skewness (x), 2/sqrt (a), 0.1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
888 %! assert (kurtosis (x), 6/a, 0.5);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
889 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
890 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
891 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
892 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
893 %! randg ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
894 %! a = 100;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
895 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
896 %! assert (mean (x), a, 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
897 %! assert (var (x), a, 2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
898 %! assert (skewness (x), 2/sqrt (a), 0.05);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
899 %! assert (kurtosis (x), 6/a, 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
900 %! endif
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
901 %!test
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
902 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
903 %!assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]) # *** Please report
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
904 %!test
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
905 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
906 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
907 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
908 %! a = 0.1;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
909 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
910 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
911 %! assert (var (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
912 %! assert (skewness (x), 2/sqrt (a), 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
913 %! assert (kurtosis (x), 6/a, 50);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
914 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
915 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
916 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
917 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
918 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
919 %! a = 0.95;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
920 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
921 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
922 %! assert (var (x), a, 0.04);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
923 %! assert (skewness (x), 2/sqrt (a), 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
924 %! assert (kurtosis (x), 6/a, 2);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
925 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
926 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
927 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
928 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
929 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
930 %! a = 1;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
931 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
932 %! assert (mean (x), a, 0.01);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
933 %! assert (var (x), a, 0.04);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
934 %! assert (skewness (x), 2/sqrt (a), 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
935 %! assert (kurtosis (x), 6/a, 2);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
936 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
937 %!test
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
938 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
939 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
940 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
941 %! a = 10;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
942 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
943 %! assert (mean (x), a, 0.1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
944 %! assert (var (x), a, 0.5);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
945 %! assert (skewness (x), 2/sqrt (a), 0.1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
946 %! assert (kurtosis (x), 6/a, 0.5);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
947 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
948 %!test
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
949 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
950 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
951 %! randg ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
952 %! a = 100;
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
953 %! x = randg (a, 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
954 %! assert (mean (x), a, 0.2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
955 %! assert (var (x), a, 2);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
956 %! assert (skewness (x), 2/sqrt (a), 0.05);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
957 %! assert (kurtosis (x), 6/a, 0.2);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
958 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
959 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
960
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
961 DEFUN (randp, args, ,
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
962 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
963 @deftypefn {} {} randp (@var{l}, @var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
964 @deftypefnx {} {} randp (@var{l}, @var{m}, @var{n}, @dots{})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
965 @deftypefnx {} {} randp (@var{l}, [@var{m} @var{n} @dots{}])
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
966 @deftypefnx {} {@var{v} =} randp ("state")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
967 @deftypefnx {} {} randp ("state", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
968 @deftypefnx {} {} randp ("state", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
969 @deftypefnx {} {@var{v} =} randp ("seed")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
970 @deftypefnx {} {} randp ("seed", @var{v})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
971 @deftypefnx {} {} randp ("seed", "reset")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
972 @deftypefnx {} {} randp (@dots{}, "single")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
973 @deftypefnx {} {} randp (@dots{}, "double")
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
974 Return a matrix with Poisson distributed random elements with mean value
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
975 parameter given by the first argument, @var{l}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
976
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
977 The arguments are handled the same as the arguments for @code{rand}, except
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
978 for the argument @var{l}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
979
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
980 Five different algorithms are used depending on the range of @var{l} and
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
981 whether or not @var{l} is a scalar or a matrix.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
982
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
983 @table @asis
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
984 @item For scalar @var{l} @leq{} 12, use direct method.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
985 W.H. Press, et al., @cite{Numerical Recipes in C},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
986 Cambridge University Press, 1992.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
987
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
988 @item For scalar @var{l} > 12, use rejection method.[1]
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
989 W.H. Press, et al., @cite{Numerical Recipes in C},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
990 Cambridge University Press, 1992.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
991
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
992 @item For matrix @var{l} @leq{} 10, use inversion method.[2]
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
993 @nospell{E. Stadlober, et al., WinRand source code}, available via FTP.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
994
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
995 @item For matrix @var{l} > 10, use patchwork rejection method.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
996 @nospell{E. Stadlober, et al., WinRand source code}, available via FTP, or
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
997 @nospell{H. Zechner}, @cite{Efficient sampling from continuous and discrete
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
998 unimodal distributions}, Doctoral Dissertation, 156pp., Technical
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
999 University @nospell{Graz}, Austria, 1994.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1000
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1001 @item For @var{l} > 1e8, use normal approximation.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1002 @nospell{L. Montanet}, et al., @cite{Review of Particle Properties},
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1003 Physical Review D 50 p1284, 1994.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1004 @end table
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1005
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1006 The class of the value returned can be controlled by a trailing
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1007 @qcode{"double"} or @qcode{"single"} argument. These are the only valid
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1008 classes.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1009 @seealso{rand, randn, rande, randg}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1010 @end deftypefn */)
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1011 {
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1012 int nargin = args.length ();
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1013
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1014 if (nargin < 1)
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1015 error ("randp: insufficient arguments");
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1016
20894
e528d7ab1cad rand.cc: Overhaul file to make use of new C++ archetype.
Rik <rik@octave.org>
parents: 20853
diff changeset
1017 return do_rand (args, nargin, "randp", "poisson", true);
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1018 }
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1019
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1020 /*
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1021 %!test
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1022 %! randp ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1023 %! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]); # *** Please report
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1024 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1025 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1026 %! randp ("state", 1);
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1027 %! assert (randp (5, 1, 6), [5 5 3 7 7 3]);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1028 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1029 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1030 %! randp ("state", 1);
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1031 %! assert (randp (15, 1, 6), [13 15 8 18 18 15]);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1032 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1033 %! ## Test a known fixed state
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1034 %! randp ("state", 1);
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1035 %! assert (randp (1e9, 1, 6), [999915677 999976657 1000047684 1000019035 999985749 999977692], -1e-6);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1036 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1037 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1038 %! randp ("seed", 1);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1039 %! %%assert (randp (5, 1, 6), [8 2 3 6 6 8])
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1040 %! assert (randp (5, 1, 5), [8 2 3 6 6]);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1041 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1042 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1043 %! randp ("seed", 1);
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1044 %! assert (randp (15, 1, 6), [15 16 12 10 10 12]);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1045 %!test
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1046 %! ## Test a known fixed seed
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1047 %! randp ("seed", 1);
21580
ecce63c99c3f maint: Add semicolons to terminate code in %! blocks.
Rik <rik@octave.org>
parents: 21301
diff changeset
1048 %! assert (randp (1e9, 1, 6), [1000006208 1000012224 999981120 999963520 999963072 999981440], -1e-6);
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1049 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1050 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
1051 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1052 %! randp ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1053 %! for a = [5, 15, 1e9; 0.03, 0.03, -5e-3; 0.03, 0.03, 0.03]
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1054 %! x = randp (a (1), 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1055 %! assert (min (x) >= 0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1056 %! assert (mean (x), a(1), a(2));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1057 %! assert (var (x), a(1), 0.02*a(1));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1058 %! assert (skewness (x), 1/sqrt (a(1)), a(3));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1059 %! assert (kurtosis (x), 1/a(1), 3*a(3));
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1060 %! endfor
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1061 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1062 %!test
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1063 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
1064 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1065 %! randp ("state", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1066 %! for a = [5, 15, 1e9; 0.03, 0.03, -5e-3; 0.03, 0.03, 0.03]
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1067 %! x = randp (a(1)*ones (100_000, 1), 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1068 %! assert (min (x) >= 0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1069 %! assert (mean (x), a(1), a(2));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1070 %! assert (var (x), a(1), 0.02*a(1));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1071 %! assert (skewness (x), 1/sqrt (a(1)), a(3));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1072 %! assert (kurtosis (x), 1/a(1), 3*a(3));
6437
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1073 %! endfor
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1074 %! endif
190dfe8b8f08 [project @ 2007-03-23 14:17:31 by dbateman]
dbateman
parents: 6198
diff changeset
1075 %!test
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1076 %! randp ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1077 %! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]); # *** Please report
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1078 %!test
6449
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1079 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
1080 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1081 %! randp ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1082 %! for a = [5, 15, 1e9; 0.03, 0.03, -5e-3; 0.03, 0.03, 0.03]
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1083 %! x = randp (a(1), 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1084 %! assert (min (x) >= 0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1085 %! assert (mean (x), a(1), a(2));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1086 %! assert (var (x), a(1), 0.02*a(1));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1087 %! assert (skewness (x), 1/sqrt (a(1)), a(3));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1088 %! assert (kurtosis (x), 1/a(1), 3*a(3));
6449
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1089 %! endfor
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1090 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1091 %!test
6449
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1092 %! if (__random_statistical_tests__)
17336
b81b9d079515 Use '##' for comments which stand alone on a line.
Rik <rik@octave.org>
parents: 17281
diff changeset
1093 %! ## statistical tests may fail occasionally.
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1094 %! randp ("seed", 12);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1095 %! for a = [5, 15, 1e9; 0.03, 0.03, -5e-3; 0.03, 0.03, 0.03]
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1096 %! x = randp (a(1)*ones (100_000, 1), 100_000, 1);
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1097 %! assert (min (x) >= 0); # *** Please report this!!! ***
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1098 %! assert (mean (x), a(1), a(2));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1099 %! assert (var (x), a(1), 0.02*a(1));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1100 %! assert (skewness (x), 1/sqrt (a(1)), a(3));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
1101 %! assert (kurtosis (x), 1/a(1), 3*a(3));
6449
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1102 %! endfor
a5de12c0f968 [project @ 2007-03-24 11:11:36 by dbateman]
dbateman
parents: 6443
diff changeset
1103 %! endif
5730
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1104 */
109fdf7b3dcb [project @ 2006-04-03 19:18:26 by jwe]
jwe
parents: 5355
diff changeset
1105
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14854
diff changeset
1106 DEFUN (randperm, args, ,
21966
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1107 doc: /* -*- texinfo -*-
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1108 @deftypefn {} {} randperm (@var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1109 @deftypefnx {} {} randperm (@var{n}, @var{m})
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1110 Return a row vector containing a random permutation of @code{1:@var{n}}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1111
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1112 If @var{m} is supplied, return @var{m} unique entries, sampled without
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1113 replacement from @code{1:@var{n}}.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1114
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1115 The complexity is O(@var{n}) in memory and O(@var{m}) in time, unless
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1116 @var{m} < @var{n}/5, in which case O(@var{m}) memory is used as well. The
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1117 randomization is performed using rand(). All permutations are equally
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1118 likely.
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1119 @seealso{perms}
112b20240c87 move docstrings in C++ files out of C strings and into comments
John W. Eaton <jwe@octave.org>
parents: 21942
diff changeset
1120 @end deftypefn */)
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1121 {
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1122 int nargin = args.length ();
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1123
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1124 if (nargin < 1 || nargin > 2)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1125 print_usage ();
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1126
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1127 octave_idx_type n = args(0).idx_type_value (true);
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1128 octave_idx_type m = (nargin == 2) ? args(1).idx_type_value (true) : n;
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
1129
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1130 if (m < 0 || n < 0)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1131 error ("randperm: M and N must be non-negative");
13186
2896c083576a Implement second randperm argument for compatibility with Matlab
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13026
diff changeset
1132
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1133 if (m > n)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1134 error ("randperm: M must be less than or equal to N");
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1135
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1136 // Quick and dirty heuristic to decide if we allocate or not the
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1137 // whole vector for tracking the truncated shuffle.
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1138 bool short_shuffle = m < n/5;
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1139
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1140 // Generate random numbers.
25433
49e0447413ad use templates and move rand functions inside octave namespace
John W. Eaton <jwe@octave.org>
parents: 25143
diff changeset
1141 NDArray r = octave::rand::nd_array (dim_vector (1, m));
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1142 double *rvec = r.fortran_vec ();
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1143
23450
855122b993da maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
parents: 23220
diff changeset
1144 octave_idx_type idx_len = (short_shuffle ? m : n);
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1145 Array<octave_idx_type> idx;
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1146 try
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1147 {
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1148 idx = Array<octave_idx_type> (dim_vector (1, idx_len));
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1149 }
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1150 catch (const std::bad_alloc&)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1151 {
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1152 // Looks like n is too big and short_shuffle is false.
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1153 // Let's try again, but this time with the alternative.
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1154 idx_len = m;
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1155 short_shuffle = true;
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1156 idx = Array<octave_idx_type> (dim_vector (1, idx_len));
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1157 }
13186
2896c083576a Implement second randperm argument for compatibility with Matlab
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13026
diff changeset
1158
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1159 octave_idx_type *ivec = idx.fortran_vec ();
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1160
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1161 for (octave_idx_type i = 0; i < idx_len; i++)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1162 ivec[i] = i;
13255
dd3c5325039c Use a hash map to store permutations in randperm's truncated Knuth shuffle
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13186
diff changeset
1163
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1164 if (short_shuffle)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1165 {
22150
c4901d7a2d7d Remove check for std::tr1::unordered_map because we depend on C++11.
Carnë Draug <carandraug@octave.org>
parents: 21968
diff changeset
1166 std::unordered_map<octave_idx_type, octave_idx_type> map (m);
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1167
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1168 // Perform the Knuth shuffle only keeping track of moved
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1169 // entries in the map
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1170 for (octave_idx_type i = 0; i < m; i++)
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1171 {
22407
34ce5be04942 maint: Style check C++ code in libinterp/.
Rik <rik@octave.org>
parents: 22327
diff changeset
1172 octave_idx_type k = i + std::floor (rvec[i] * (n - i));
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1173
22407
34ce5be04942 maint: Style check C++ code in libinterp/.
Rik <rik@octave.org>
parents: 22327
diff changeset
1174 // For shuffling first m entries, no need to use extra storage
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1175 if (k < m)
17662
0b7f5c56f853 Allow randperm to work with bigger inputs (bug #39378)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 17336
diff changeset
1176 {
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1177 std::swap (ivec[i], ivec[k]);
13255
dd3c5325039c Use a hash map to store permutations in randperm's truncated Knuth shuffle
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13186
diff changeset
1178 }
dd3c5325039c Use a hash map to store permutations in randperm's truncated Knuth shuffle
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13186
diff changeset
1179 else
dd3c5325039c Use a hash map to store permutations in randperm's truncated Knuth shuffle
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13186
diff changeset
1180 {
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1181 if (map.find (k) == map.end ())
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1182 map[k] = k;
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1183
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1184 std::swap (ivec[i], map[k]);
13255
dd3c5325039c Use a hash map to store permutations in randperm's truncated Knuth shuffle
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 13186
diff changeset
1185 }
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1186 }
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1187 }
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1188 else
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1189 {
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1190 // Perform the Knuth shuffle of the first m entries
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1191 for (octave_idx_type i = 0; i < m; i++)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1192 {
22407
34ce5be04942 maint: Style check C++ code in libinterp/.
Rik <rik@octave.org>
parents: 22327
diff changeset
1193 octave_idx_type k = i + std::floor (rvec[i] * (n - i));
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1194 std::swap (ivec[i], ivec[k]);
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1195 }
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1196 }
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1197
20801
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1198 // Convert to doubles, reusing r.
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1199 for (octave_idx_type i = 0; i < m; i++)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1200 rvec[i] = ivec[i] + 1;
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1201
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1202 if (m < n)
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1203 idx.resize (dim_vector (1, m));
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1204
a542a9bf177e eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents: 20785
diff changeset
1205 // Now create an array object with a cached idx_vector.
21127
df7891224709 maint: Use "return ovl (...)" in DEFUN macros.
Rik <rik@octave.org>
parents: 21100
diff changeset
1206 return ovl (new octave_matrix (r, idx_vector (idx)));
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1207 }
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1208
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1209 /*
14688
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1210 %!assert (sort (randperm (20)), 1:20)
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1211 %!assert (length (randperm (20,10)), 10)
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1212
22489
93ea313301f9 test: Add bug ids (<#####>) to BIST tests.
Rik <rik@octave.org>
parents: 22407
diff changeset
1213 ## Test biggish N
24856
8bb0251fcfde Use a uint32 state vector for random number generators (bug #50256).
Rik <rik@octave.org>
parents: 24817
diff changeset
1214 %!assert <*39378> (length (randperm (30_000^2, 100_000)), 100_000)
17662
0b7f5c56f853 Allow randperm to work with bigger inputs (bug #39378)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 17336
diff changeset
1215
14688
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1216 %!test
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1217 %! rand ("seed", 0);
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1218 %! for i = 1:100
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1219 %! p = randperm (305, 30);
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1220 %! assert (length (unique (p)), 30);
42edbe6f6a8d Fix bad two-arg call of randperm (bug #36535)
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 14138
diff changeset
1221 %! endfor
9647
54f45f883a53 optimize & extend randperm
Jaroslav Hajek <highegg@gmail.com>
parents: 9377
diff changeset
1222 */