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annotate libinterp/corefcn/find.cc @ 18815:888f8ce79bbe

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maint: Periodic merge gui-release -> default.
author Rik <rik@octave.org>
date Sun, 25 May 2014 10:29:05 -0700
parents 6113e0c6920b a5286fb173cd
children 03c2671493f9
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1 /*
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2
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3 Copyright (C) 1996-2013 John W. Eaton
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4
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5 This file is part of Octave.
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6
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
7016
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9 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "quit.h"
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28
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29 #include "defun.h"
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30 #include "error.h"
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31 #include "gripes.h"
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32 #include "oct-obj.h"
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33
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34 // Find at most N_TO_FIND nonzero elements in NDA. Search forward if
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35 // DIRECTION is 1, backward if it is -1. NARGOUT is the number of
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36 // output arguments. If N_TO_FIND is -1, find all nonzero elements.
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37
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38 template <typename T>
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39 octave_value_list
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40 find_nonzero_elem_idx (const Array<T>& nda, int nargout,
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41 octave_idx_type n_to_find, int direction)
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42 {
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43 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
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44
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45 Array<octave_idx_type> idx;
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46 if (n_to_find >= 0)
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47 idx = nda.find (n_to_find, direction == -1);
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48 else
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49 idx = nda.find ();
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50
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51 // The maximum element is always at the end.
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52 octave_idx_type iext = idx.is_empty () ? 0 : idx.xelem (idx.numel () - 1) + 1;
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53
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54 switch (nargout)
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55 {
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56 default:
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57 case 3:
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58 retval(2) = Array<T> (nda.index (idx_vector (idx)));
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59 // Fall through!
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60
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61 case 2:
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62 {
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63 Array<octave_idx_type> jdx (idx.dims ());
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64 octave_idx_type n = idx.length ();
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65 octave_idx_type nr = nda.rows ();
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66 for (octave_idx_type i = 0; i < n; i++)
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67 {
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68 jdx.xelem (i) = idx.xelem (i) / nr;
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69 idx.xelem (i) %= nr;
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70 }
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71 iext = -1;
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72 retval(1) = idx_vector (jdx, -1);
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73 }
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74 // Fall through!
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75
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76 case 1:
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77 case 0:
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78 retval(0) = idx_vector (idx, iext);
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79 break;
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80 }
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81
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82 return retval;
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83 }
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84
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85 template <typename T>
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86 octave_value_list
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87 find_nonzero_elem_idx (const Sparse<T>& v, int nargout,
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88 octave_idx_type n_to_find, int direction)
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89 {
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90 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
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91
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92 octave_idx_type nr = v.rows ();
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93 octave_idx_type nc = v.cols ();
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94 octave_idx_type nz = v.nnz ();
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95
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96 // Search in the default range.
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97 octave_idx_type start_nc = -1;
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98 octave_idx_type end_nc = -1;
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99 octave_idx_type count;
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100
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101 // Search for the range to search
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102 if (n_to_find < 0)
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103 {
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104 start_nc = 0;
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105 end_nc = nc;
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106 n_to_find = nz;
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107 count = nz;
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108 }
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109 else if (direction > 0)
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110 {
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111 for (octave_idx_type j = 0; j < nc; j++)
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112 {
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113 OCTAVE_QUIT;
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114 if (v.cidx (j) == 0 && v.cidx (j+1) != 0)
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115 start_nc = j;
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116 if (v.cidx (j+1) >= n_to_find)
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117 {
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118 end_nc = j + 1;
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119 break;
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120 }
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121 }
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122 }
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123 else
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124 {
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125 for (octave_idx_type j = nc; j > 0; j--)
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126 {
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127 OCTAVE_QUIT;
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128 if (v.cidx (j) == nz && v.cidx (j-1) != nz)
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129 end_nc = j;
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130 if (nz - v.cidx (j-1) >= n_to_find)
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131 {
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132 start_nc = j - 1;
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133 break;
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134 }
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135 }
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136 }
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137
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138 count = (n_to_find > v.cidx (end_nc) - v.cidx (start_nc) ?
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139 v.cidx (end_nc) - v.cidx (start_nc) : n_to_find);
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diff changeset
140
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parents: 17787
diff changeset
141 octave_idx_type result_nr;
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
142 octave_idx_type result_nc;
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143
18813
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diff changeset
144 // Default case is to return a column vector, however, if the original
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
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145 // argument was a row vector, then force return of a row vector.
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
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diff changeset
146 if (nr == 1)
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diff changeset
147 {
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diff changeset
148 result_nr = 1;
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149 result_nc = count;
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Rik <rik@octave.org>
parents: 17787
diff changeset
150 }
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
151 else
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
152 {
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
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diff changeset
153 result_nr = count;
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Rik <rik@octave.org>
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diff changeset
154 result_nc = 1;
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155 }
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diff changeset
156
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diff changeset
157 Matrix idx (result_nr, result_nc);
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diff changeset
158
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diff changeset
159 Matrix i_idx (result_nr, result_nc);
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diff changeset
160 Matrix j_idx (result_nr, result_nc);
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diff changeset
161
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Jaroslav Hajek <highegg@gmail.com>
parents: 9544
diff changeset
162 Array<T> val (dim_vector (result_nr, result_nc));
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163
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
164 if (count > 0)
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165 {
18813
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166 // Search for elements to return. Only search the region where there
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
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167 // are elements to be found using the count that we want to find.
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168 for (octave_idx_type j = start_nc, cx = 0; j < end_nc; j++)
18712
6113e0c6920b maint: Clean up extra spaces before/after parentheses.
Rik <rik@octave.org>
parents: 18710
diff changeset
169 for (octave_idx_type i = v.cidx (j); i < v.cidx (j+1); i++)
10154
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John W. Eaton <jwe@octave.org>
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170 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
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parents: 9894
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171 OCTAVE_QUIT;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
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172 if (direction < 0 && i < nz - count)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
173 continue;
14854
5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory
Rik <octave@nomad.inbox5.com>
parents: 14846
diff changeset
174 i_idx(cx) = static_cast<double> (v.ridx (i) + 1);
10154
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John W. Eaton <jwe@octave.org>
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175 j_idx(cx) = static_cast<double> (j + 1);
14854
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Rik <octave@nomad.inbox5.com>
parents: 14846
diff changeset
176 idx(cx) = j * nr + v.ridx (i) + 1;
10154
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diff changeset
177 val(cx) = v.data(i);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
178 cx++;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
179 if (cx == count)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
180 break;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
181 }
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182 }
18813
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parents: 17787
diff changeset
183 else
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184 {
18813
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185 // No items found. Fixup return dimensions for Matlab compatibility.
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parents: 17787
diff changeset
186 // The behavior to match is documented in Array.cc (Array<T>::find).
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
187 if ((nr == 0 && nc == 0) || nr == 1 & nc == 1)
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
188 {
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
189 idx.resize (0, 0);
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diff changeset
190
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diff changeset
191 i_idx.resize (0, 0);
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
192 j_idx.resize (0, 0);
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diff changeset
193
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diff changeset
194 val.resize (dim_vector (0, 0));
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
Rik <rik@octave.org>
parents: 17787
diff changeset
195 }
7505
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diff changeset
196 }
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David Bateman <dbateman@free.fr>
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diff changeset
197
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
198 switch (nargout)
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199 {
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David Bateman <dbateman@free.fr>
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diff changeset
200 case 0:
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David Bateman <dbateman@free.fr>
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diff changeset
201 case 1:
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David Bateman <dbateman@free.fr>
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diff changeset
202 retval(0) = idx;
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David Bateman <dbateman@free.fr>
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diff changeset
203 break;
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
204
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
205 case 5:
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David Bateman <dbateman@free.fr>
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diff changeset
206 retval(4) = nc;
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David Bateman <dbateman@free.fr>
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diff changeset
207 // Fall through
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David Bateman <dbateman@free.fr>
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diff changeset
208
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David Bateman <dbateman@free.fr>
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diff changeset
209 case 4:
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David Bateman <dbateman@free.fr>
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diff changeset
210 retval(3) = nr;
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David Bateman <dbateman@free.fr>
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diff changeset
211 // Fall through
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David Bateman <dbateman@free.fr>
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diff changeset
212
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
213 case 3:
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
214 retval(2) = val;
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
215 // Fall through!
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
216
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
217 case 2:
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David Bateman <dbateman@free.fr>
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diff changeset
218 retval(1) = j_idx;
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
219 retval(0) = i_idx;
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
220 break;
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
221
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
222 default:
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
223 panic_impossible ();
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
224 break;
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
225 }
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
226
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
227 return retval;
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
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diff changeset
228 }
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
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diff changeset
229
8955
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
230 octave_value_list
11586
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John W. Eaton <jwe@octave.org>
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diff changeset
231 find_nonzero_elem_idx (const PermMatrix& v, int nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
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diff changeset
232 octave_idx_type n_to_find, int direction)
8955
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Jason Riedy <jason@acm.org>
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diff changeset
233 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
234 // There are far fewer special cases to handle for a PermMatrix.
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
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diff changeset
235 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
236
18813
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Rik <rik@octave.org>
parents: 17787
diff changeset
237 octave_idx_type nr = v.rows ();
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14501
diff changeset
238 octave_idx_type nc = v.cols ();
13219
cf5ebc0e47e4 fix warnings for unused but set variables and shadowed variables
John W. Eaton <jwe@octave.org>
parents: 12639
diff changeset
239 octave_idx_type start_nc, count;
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
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diff changeset
240
8955
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Jason Riedy <jason@acm.org>
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diff changeset
241 // Determine the range to search.
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
242 if (n_to_find < 0 || n_to_find >= nc)
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
243 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
244 start_nc = 0;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
245 count = nc;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
246 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
247 else if (direction > 0)
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
248 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
249 start_nc = 0;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
250 count = n_to_find;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
251 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
252 else
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
253 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
254 start_nc = nc - n_to_find;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
255 count = n_to_find;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
256 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
257
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
258 Matrix idx (count, 1);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
259 Matrix i_idx (count, 1);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
260 Matrix j_idx (count, 1);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
261 // Every value is 1.
9732
b4fdfee405b5 remove ArrayN<T> + fix nonhom. diag-scalar ops
Jaroslav Hajek <highegg@gmail.com>
parents: 9544
diff changeset
262 Array<double> val (dim_vector (count, 1), 1.0);
8955
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Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
263
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
264 if (count > 0)
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
265 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
266 const octave_idx_type* p = v.data ();
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
267 if (v.is_col_perm ())
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
268 {
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
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diff changeset
269 for (octave_idx_type k = 0; k < count; k++)
8955
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Jason Riedy <jason@acm.org>
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diff changeset
270 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
271 OCTAVE_QUIT;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
272 const octave_idx_type j = start_nc + k;
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
273 const octave_idx_type i = p[j];
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Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
274 i_idx(k) = static_cast<double> (1+i);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
275 j_idx(k) = static_cast<double> (1+j);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
276 idx(k) = j * nc + i + 1;
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Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
277 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
278 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
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279 else
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Jason Riedy <jason@acm.org>
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280 {
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
281 for (octave_idx_type k = 0; k < count; k++)
8955
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282 {
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283 OCTAVE_QUIT;
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284 const octave_idx_type i = start_nc + k;
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285 const octave_idx_type j = p[i];
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286 // Scatter into the index arrays according to
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diff changeset
287 // j adjusted by the start point.
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288 const octave_idx_type koff = j - start_nc;
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289 i_idx(koff) = static_cast<double> (1+i);
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290 j_idx(koff) = static_cast<double> (1+j);
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291 idx(koff) = j * nc + i + 1;
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292 }
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293 }
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Jason Riedy <jason@acm.org>
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294 }
18813
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diff changeset
295 else
8955
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Jason Riedy <jason@acm.org>
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296 {
18813
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297 // FIXME: Is this case even possible? A scalar permutation matrix seems to devolve
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
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298 // to a scalar full matrix, at least from the Octave command line. Perhaps
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299 // this function could be called internally from C++ with such a matrix.
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300 // No items found. Fixup return dimensions for Matlab compatibility.
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301 // The behavior to match is documented in Array.cc (Array<T>::find).
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302 if ((nr == 0 && nc == 0) || nr == 1 & nc == 1)
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
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303 {
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304 idx.resize (0, 0);
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305
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306 i_idx.resize (0, 0);
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307 j_idx.resize (0, 0);
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308
a5286fb173cd Match Matlab return dimensions for find on empty sparse matrices (bug #42408).
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diff changeset
309 val.resize (dim_vector (0, 0));
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310 }
8955
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311 }
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312
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313 switch (nargout)
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314 {
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315 case 0:
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316 case 1:
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317 retval(0) = idx;
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318 break;
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319
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Jason Riedy <jason@acm.org>
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diff changeset
320 case 5:
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321 retval(4) = nc;
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322 // Fall through
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Jason Riedy <jason@acm.org>
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323
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Jason Riedy <jason@acm.org>
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diff changeset
324 case 4:
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325 retval(3) = nc;
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326 // Fall through
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327
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Jason Riedy <jason@acm.org>
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diff changeset
328 case 3:
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329 retval(2) = val;
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330 // Fall through!
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331
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Jason Riedy <jason@acm.org>
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diff changeset
332 case 2:
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333 retval(1) = j_idx;
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diff changeset
334 retval(0) = i_idx;
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Jason Riedy <jason@acm.org>
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335 break;
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336
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Jason Riedy <jason@acm.org>
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337 default:
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Jason Riedy <jason@acm.org>
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338 panic_impossible ();
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339 break;
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Jason Riedy <jason@acm.org>
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340 }
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341
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Jason Riedy <jason@acm.org>
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342 return retval;
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343 }
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Jason Riedy <jason@acm.org>
parents: 8920
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344
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Rik <rik@octave.org>
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345 DEFUN (find, args, nargout,
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346 "-*- texinfo -*-\n\
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347 @deftypefn {Built-in Function} {@var{idx} =} find (@var{x})\n\
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348 @deftypefnx {Built-in Function} {@var{idx} =} find (@var{x}, @var{n})\n\
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349 @deftypefnx {Built-in Function} {@var{idx} =} find (@var{x}, @var{n}, @var{direction})\n\
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350 @deftypefnx {Built-in Function} {[i, j] =} find (@dots{})\n\
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351 @deftypefnx {Built-in Function} {[i, j, v] =} find (@dots{})\n\
6524
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352 Return a vector of indices of nonzero elements of a matrix, as a row if\n\
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353 @var{x} is a row vector or as a column otherwise. To obtain a single index\n\
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parents: 11586
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354 for each matrix element, Octave pretends that the columns of a matrix form\n\
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diff changeset
355 one long vector (like Fortran arrays are stored). For example:\n\
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356 \n\
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357 @example\n\
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358 @group\n\
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359 find (eye (2))\n\
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diff changeset
360 @result{} [ 1; 4 ]\n\
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361 @end group\n\
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parents: 3014
diff changeset
362 @end example\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
363 \n\
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jwe
parents: 3014
diff changeset
364 If two outputs are requested, @code{find} returns the row and column\n\
10840
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parents: 10826
diff changeset
365 indices of nonzero elements of a matrix. For example:\n\
3369
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jwe
parents: 3014
diff changeset
366 \n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
367 @example\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
368 @group\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
369 [i, j] = find (2 * eye (2))\n\
14360
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parents: 14138
diff changeset
370 @result{} i = [ 1; 2 ]\n\
97883071e8e4 doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
371 @result{} j = [ 1; 2 ]\n\
3369
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jwe
parents: 3014
diff changeset
372 @end group\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
373 @end example\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
374 \n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
375 If three outputs are requested, @code{find} also returns a vector\n\
10840
89f4d7e294cc Grammarcheck .cc files
Rik <octave@nomad.inbox5.com>
parents: 10826
diff changeset
376 containing the nonzero values. For example:\n\
3369
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jwe
parents: 3014
diff changeset
377 \n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
378 @example\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
379 @group\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
380 [i, j, v] = find (3 * eye (2))\n\
14360
97883071e8e4 doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
381 @result{} i = [ 1; 2 ]\n\
97883071e8e4 doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
382 @result{} j = [ 1; 2 ]\n\
97883071e8e4 doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
383 @result{} v = [ 3; 3 ]\n\
3369
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jwe
parents: 3014
diff changeset
384 @end group\n\
f37ca3017116 [project @ 1999-11-21 16:26:02 by jwe]
jwe
parents: 3014
diff changeset
385 @end example\n\
6002
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jwe
parents: 5823
diff changeset
386 \n\
9310
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Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
387 If two inputs are given, @var{n} indicates the maximum number of\n\
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
388 elements to find from the beginning of the matrix or vector.\n\
6002
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jwe
parents: 5823
diff changeset
389 \n\
17281
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Rik <rik@octave.org>
parents: 15195
diff changeset
390 If three inputs are given, @var{direction} should be one of\n\
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 15195
diff changeset
391 @qcode{\"first\"} or @qcode{\"last\"}, requesting only the first or last\n\
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 15195
diff changeset
392 @var{n} indices, respectively. However, the indices are always returned in\n\
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 15195
diff changeset
393 ascending order.\n\
7505
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
394 \n\
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
395 Note that this function is particularly useful for sparse matrices, as\n\
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
396 it extracts the non-zero elements as vectors, which can then be used to\n\
10840
89f4d7e294cc Grammarcheck .cc files
Rik <octave@nomad.inbox5.com>
parents: 10826
diff changeset
397 create the original matrix. For example:\n\
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
398 \n\
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
399 @example\n\
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
400 @group\n\
12639
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Rik <octave@nomad.inbox5.com>
parents: 11586
diff changeset
401 sz = size (a);\n\
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
402 [i, j, v] = find (a);\n\
12639
4d777e05d47c doc: Review and update documentation for "Matrix Manipulation" chapter.
Rik <octave@nomad.inbox5.com>
parents: 11586
diff changeset
403 b = sparse (i, j, v, sz(1), sz(2));\n\
7505
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David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
404 @end group\n\
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
405 @end example\n\
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
406 @seealso{nonzeros}\n\
3369
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jwe
parents: 3014
diff changeset
407 @end deftypefn")
2928
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jwe
parents:
diff changeset
408 {
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
409 octave_value_list retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
410
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
411 int nargin = args.length ();
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
412
6002
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jwe
parents: 5823
diff changeset
413 if (nargin > 3 || nargin < 1)
2928
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jwe
parents:
diff changeset
414 {
5823
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jwe
parents: 5307
diff changeset
415 print_usage ();
2928
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jwe
parents:
diff changeset
416 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
417 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
418
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
419 // Setup the default options.
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
420 octave_idx_type n_to_find = -1;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
421 if (nargin > 1)
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
422 {
9310
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
423 double val = args(1).scalar_value ();
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
424
10338
21dd58bd683c fix unsafe conversion in find
Jaroslav Hajek <highegg@gmail.com>
parents: 10285
diff changeset
425 if (error_state || (val < 0 || (! xisinf (val) && val != xround (val))))
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
426 {
14062
5b49cafe0599 Use non-negative, non-positive with hyphens in error messages.
Rik <octave@nomad.inbox5.com>
parents: 13915
diff changeset
427 error ("find: N must be a non-negative integer");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
428 return retval;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
429 }
10338
21dd58bd683c fix unsafe conversion in find
Jaroslav Hajek <highegg@gmail.com>
parents: 10285
diff changeset
430 else if (! xisinf (val))
9310
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
431 n_to_find = val;
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
432 }
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
433
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
434 // Direction to do the searching (1 == forward, -1 == reverse).
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
435 int direction = 1;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
436 if (nargin > 2)
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
437 {
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
438 direction = 0;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
439
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
440 std::string s_arg = args(2).string_value ();
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
441
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
442 if (! error_state)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
443 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
444 if (s_arg == "first")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
445 direction = 1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
446 else if (s_arg == "last")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
447 direction = -1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
448 }
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
449
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
450 if (direction == 0)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
451 {
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
452 error ("find: DIRECTION must be \"first\" or \"last\"");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
453 return retval;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
454 }
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
455 }
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
456
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
457 octave_value arg = args(0);
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
458
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
459 if (arg.is_bool_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
460 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
461 if (arg.is_sparse_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
462 {
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
463 SparseBoolMatrix v = arg.sparse_bool_matrix_value ();
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
464
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
465 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
466 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
467 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
468 }
9544
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
469 else if (nargout <= 1 && n_to_find == -1 && direction == 1)
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
470 {
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
471 // This case is equivalent to extracting indices from a logical
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
472 // matrix. Try to reuse the possibly cached index vector.
9894
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9732
diff changeset
473 retval(0) = arg.index_vector ().unmask ();
9544
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
474 }
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
475 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
476 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
477 boolNDArray v = arg.bool_array_value ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
478
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
479 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
480 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
481 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
482 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
483 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
484 else if (arg.is_integer_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
485 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
486 #define DO_INT_BRANCH(INTT) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
487 else if (arg.is_ ## INTT ## _type ()) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
488 { \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
489 INTT ## NDArray v = arg.INTT ## _array_value (); \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
490 \
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
491 if (! error_state) \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
492 retval = find_nonzero_elem_idx (v, nargout, \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
493 n_to_find, direction);\
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
494 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
495
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
496 if (false)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
497 ;
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
498 DO_INT_BRANCH (int8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
499 DO_INT_BRANCH (int16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
500 DO_INT_BRANCH (int32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
501 DO_INT_BRANCH (int64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
502 DO_INT_BRANCH (uint8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
503 DO_INT_BRANCH (uint16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
504 DO_INT_BRANCH (uint32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
505 DO_INT_BRANCH (uint64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
506 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
507 panic_impossible ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
508 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
509 else if (arg.is_sparse_type ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
510 {
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
511 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
512 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
513 SparseMatrix v = arg.sparse_matrix_value ();
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
514
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
515 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
516 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
517 n_to_find, direction);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
518 }
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
519 else if (arg.is_complex_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
520 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
521 SparseComplexMatrix v = arg.sparse_complex_matrix_value ();
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
diff changeset
522
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
523 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
524 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
525 n_to_find, direction);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
526 }
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
527 else
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
528 gripe_wrong_type_arg ("find", arg);
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
diff changeset
529 }
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
530 else if (arg.is_perm_matrix ())
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
531 {
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
532 PermMatrix P = arg.perm_matrix_value ();
8955
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
533
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
534 if (! error_state)
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
535 retval = find_nonzero_elem_idx (P, nargout, n_to_find, direction);
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
536 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
537 else if (arg.is_string ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
538 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
539 charNDArray chnda = arg.char_array_value ();
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
540
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
541 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
542 retval = find_nonzero_elem_idx (chnda, nargout, n_to_find, direction);
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
543 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
544 else if (arg.is_single_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
545 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
546 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
547 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
548 FloatNDArray nda = arg.float_array_value ();
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7505
diff changeset
549
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
550 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
551 retval = find_nonzero_elem_idx (nda, nargout, n_to_find,
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
552 direction);
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
553 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
554 else if (arg.is_complex_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
555 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
556 FloatComplexNDArray cnda = arg.float_complex_array_value ();
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7505
diff changeset
557
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
558 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
559 retval = find_nonzero_elem_idx (cnda, nargout, n_to_find,
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
560 direction);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
561 }
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
562 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
563 else if (arg.is_real_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
564 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
565 NDArray nda = arg.array_value ();
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
566
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
567 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
568 retval = find_nonzero_elem_idx (nda, nargout, n_to_find, direction);
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
569 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
570 else if (arg.is_complex_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
571 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
572 ComplexNDArray cnda = arg.complex_array_value ();
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
573
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
574 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
575 retval = find_nonzero_elem_idx (cnda, nargout, n_to_find, direction);
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
576 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
577 else
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
578 gripe_wrong_type_arg ("find", arg);
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jwe
parents:
diff changeset
579
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
580 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
581 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
582
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
583 /*
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
584 %!assert (find (char ([0, 97])), 2)
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
585 %!assert (find ([1, 0, 1, 0, 1]), [1, 3, 5])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
586 %!assert (find ([1; 0; 3; 0; 1]), [1; 3; 5])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
587 %!assert (find ([0, 0, 2; 0, 3, 0; -1, 0, 0]), [3; 5; 7])
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
588
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
589 %!test
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
590 %! [i, j, v] = find ([0, 0, 2; 0, 3, 0; -1, 0, 0]);
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
591 %!
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
592 %! assert (i, [3; 2; 1]);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
593 %! assert (j, [1; 2; 3]);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
594 %! assert (v, [-1; 3; 2]);
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
595
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
596 %!assert (find (single ([1, 0, 1, 0, 1])), [1, 3, 5])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
597 %!assert (find (single ([1; 0; 3; 0; 1])), [1; 3; 5])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
598 %!assert (find (single ([0, 0, 2; 0, 3, 0; -1, 0, 0])), [3; 5; 7])
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
599
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
600 %!test
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
601 %! [i, j, v] = find (single ([0, 0, 2; 0, 3, 0; -1, 0, 0]));
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
602 %!
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
603 %! assert (i, [3; 2; 1]);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
604 %! assert (j, [1; 2; 3]);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
605 %! assert (v, single ([-1; 3; 2]));
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
606
8955
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
607 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
608 %! pcol = [5 1 4 3 2];
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
609 %! P = eye (5) (:, pcol);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
610 %! [i, j, v] = find (P);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
611 %! [ifull, jfull, vfull] = find (full (P));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
612 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
613 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
614 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
615
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
616 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
617 %! prow = [5 1 4 3 2];
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
618 %! P = eye (5) (prow, :);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
619 %! [i, j, v] = find (P);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
620 %! [ifull, jfull, vfull] = find (full (P));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
621 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
622 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
623 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
624
9310
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
625 %!assert (find ([2 0 1 0 5 0], 1), 1)
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
626 %!assert (find ([2 0 1 0 5 0], 2, "last"), [3, 5])
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
627
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
628 %!assert (find ([2 0 1 0 5 0], Inf), [1, 3, 5])
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
629 %!assert (find ([2 0 1 0 5 0], Inf, "last"), [1, 3, 5])
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
630
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
631 %!error find ()
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
632 */