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annotate src/DLD-FUNCTIONS/find.cc @ 11586:12df7854fa7c

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strip trailing whitespace from source files
author John W. Eaton <jwe@octave.org>
date Thu, 20 Jan 2011 17:24:59 -0500
parents 01f703952eff
children 4d777e05d47c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996-2011 John W. Eaton
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4
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5 This file is part of Octave.
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6
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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
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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
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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-dld.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 (), nr = nda.rows ();
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65 for (octave_idx_type i = 0; i < n; i++)
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66 {
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67 jdx.xelem (i) = idx.xelem (i) / nr;
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68 idx.xelem (i) %= nr;
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69 }
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70 iext = -1;
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71 retval(1) = idx_vector (jdx, -1);
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72 }
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73 // Fall through!
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74
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75 case 1:
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76 case 0:
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77 retval(0) = idx_vector (idx, iext);
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78 break;
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79 }
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80
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81 return retval;
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82 }
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83
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84 template <typename T>
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85 octave_value_list
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86 find_nonzero_elem_idx (const Sparse<T>& v, int nargout,
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87 octave_idx_type n_to_find, int direction)
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88 {
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89 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
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90
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91
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92 octave_idx_type nc = v.cols();
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93 octave_idx_type nr = v.rows();
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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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140
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141 // If the original argument was a row vector, force a row vector of
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142 // the overall indices to be returned. But see below for scalar
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143 // case...
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144
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145 octave_idx_type result_nr = count;
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146 octave_idx_type result_nc = 1;
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147
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148 bool scalar_arg = false;
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149
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150 if (v.rows () == 1)
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151 {
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152 result_nr = 1;
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153 result_nc = count;
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154
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155 scalar_arg = (v.columns () == 1);
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156 }
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157
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158 Matrix idx (result_nr, result_nc);
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159
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160 Matrix i_idx (result_nr, result_nc);
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161 Matrix j_idx (result_nr, result_nc);
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162
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163 Array<T> val (dim_vector (result_nr, result_nc));
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164
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165 if (count > 0)
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166 {
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167 // Search for elements to return. Only search the region where
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168 // there are elements to be found using the count that we want
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169 // to find.
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170 for (octave_idx_type j = start_nc, cx = 0; j < end_nc; j++)
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171 for (octave_idx_type i = v.cidx(j); i < v.cidx(j+1); i++ )
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172 {
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173 OCTAVE_QUIT;
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174 if (direction < 0 && i < nz - count)
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175 continue;
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176 i_idx(cx) = static_cast<double> (v.ridx(i) + 1);
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177 j_idx(cx) = static_cast<double> (j + 1);
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178 idx(cx) = j * nr + v.ridx(i) + 1;
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179 val(cx) = v.data(i);
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180 cx++;
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181 if (cx == count)
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182 break;
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183 }
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184 }
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185 else if (scalar_arg)
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186 {
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187 idx.resize (0, 0);
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188
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189 i_idx.resize (0, 0);
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190 j_idx.resize (0, 0);
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191
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192 val.resize (dim_vector (0, 0));
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193 }
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194
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195 switch (nargout)
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196 {
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197 case 0:
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198 case 1:
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199 retval(0) = idx;
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200 break;
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201
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202 case 5:
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203 retval(4) = nc;
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204 // Fall through
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205
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206 case 4:
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207 retval(3) = nr;
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208 // Fall through
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209
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210 case 3:
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211 retval(2) = val;
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212 // Fall through!
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213
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214 case 2:
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215 retval(1) = j_idx;
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216 retval(0) = i_idx;
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217 break;
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218
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diff changeset
219 default:
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220 panic_impossible ();
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221 break;
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222 }
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223
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224 return retval;
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225 }
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226
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diff changeset
227 octave_value_list
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diff changeset
228 find_nonzero_elem_idx (const PermMatrix& v, int nargout,
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229 octave_idx_type n_to_find, int direction)
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230 {
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diff changeset
231 // There are far fewer special cases to handle for a PermMatrix.
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diff changeset
232 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
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233
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diff changeset
234 octave_idx_type nc = v.cols();
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diff changeset
235 octave_idx_type start_nc, end_nc, count;
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diff changeset
236
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diff changeset
237 // Determine the range to search.
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diff changeset
238 if (n_to_find < 0 || n_to_find >= nc)
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diff changeset
239 {
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diff changeset
240 start_nc = 0;
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diff changeset
241 end_nc = nc;
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diff changeset
242 n_to_find = nc;
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diff changeset
243 count = nc;
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diff changeset
244 }
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Jason Riedy <jason@acm.org>
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diff changeset
245 else if (direction > 0)
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diff changeset
246 {
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diff changeset
247 start_nc = 0;
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diff changeset
248 end_nc = n_to_find;
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diff changeset
249 count = n_to_find;
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250 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
251 else
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Jason Riedy <jason@acm.org>
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diff changeset
252 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
253 start_nc = nc - n_to_find;
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diff changeset
254 end_nc = nc;
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diff changeset
255 count = n_to_find;
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diff changeset
256 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
257
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
258 bool scalar_arg = (v.rows () == 1 && v.cols () == 1);
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diff changeset
259
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
260 Matrix idx (count, 1);
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diff changeset
261 Matrix i_idx (count, 1);
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diff changeset
262 Matrix j_idx (count, 1);
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diff changeset
263 // Every value is 1.
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diff changeset
264 Array<double> val (dim_vector (count, 1), 1.0);
8955
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diff changeset
265
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
266 if (count > 0)
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
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diff changeset
267 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
268 const octave_idx_type* p = v.data ();
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diff changeset
269 if (v.is_col_perm ())
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diff changeset
270 {
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diff changeset
271 for (octave_idx_type k = 0; k < count; k++)
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diff changeset
272 {
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diff changeset
273 OCTAVE_QUIT;
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diff changeset
274 const octave_idx_type j = start_nc + k;
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diff changeset
275 const octave_idx_type i = p[j];
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diff changeset
276 i_idx(k) = static_cast<double> (1+i);
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diff changeset
277 j_idx(k) = static_cast<double> (1+j);
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diff changeset
278 idx(k) = j * nc + i + 1;
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diff changeset
279 }
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diff changeset
280 }
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diff changeset
281 else
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diff changeset
282 {
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diff changeset
283 for (octave_idx_type k = 0; k < count; k++)
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284 {
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285 OCTAVE_QUIT;
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286 const octave_idx_type i = start_nc + k;
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287 const octave_idx_type j = p[i];
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288 // Scatter into the index arrays according to
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289 // j adjusted by the start point.
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290 const octave_idx_type koff = j - start_nc;
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291 i_idx(koff) = static_cast<double> (1+i);
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292 j_idx(koff) = static_cast<double> (1+j);
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293 idx(koff) = j * nc + i + 1;
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294 }
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295 }
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296 }
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297 else if (scalar_arg)
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298 {
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299 // Same odd compatibility case as the other overrides.
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300 idx.resize (0, 0);
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301 i_idx.resize (0, 0);
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302 j_idx.resize (0, 0);
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303 val.resize (dim_vector (0, 0));
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304 }
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305
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306 switch (nargout)
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307 {
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308 case 0:
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309 case 1:
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310 retval(0) = idx;
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311 break;
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312
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313 case 5:
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314 retval(4) = nc;
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315 // Fall through
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316
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317 case 4:
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318 retval(3) = nc;
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319 // Fall through
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320
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321 case 3:
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322 retval(2) = val;
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323 // Fall through!
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324
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325 case 2:
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326 retval(1) = j_idx;
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327 retval(0) = i_idx;
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328 break;
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329
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330 default:
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331 panic_impossible ();
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332 break;
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333 }
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334
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335 return retval;
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336 }
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337
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338 DEFUN_DLD (find, args, nargout,
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339 "-*- texinfo -*-\n\
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340 @deftypefn {Loadable Function} {@var{idx} =} find (@var{x})\n\
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341 @deftypefnx {Loadable Function} {@var{idx} =} find (@var{x}, @var{n})\n\
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342 @deftypefnx {Loadable Function} {@var{idx} =} find (@var{x}, @var{n}, @var{direction})\n\
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343 @deftypefnx {Loadable Function} {[i, j] =} find (@dots{})\n\
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344 @deftypefnx {Loadable Function} {[i, j, v]] =} find (@dots{})\n\
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345 Return a vector of indices of nonzero elements of a matrix, as a row if\n\
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346 @var{x} is a row or as a column otherwise. To obtain a single index for\n\
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347 each matrix element, Octave pretends that the columns of a matrix form one\n\
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348 long vector (like Fortran arrays are stored). For example:\n\
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349 \n\
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350 @example\n\
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351 @group\n\
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352 find (eye (2))\n\
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353 @result{} [ 1; 4 ]\n\
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354 @end group\n\
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355 @end example\n\
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356 \n\
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357 If two outputs are requested, @code{find} returns the row and column\n\
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358 indices of nonzero elements of a matrix. For example:\n\
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359 \n\
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360 @example\n\
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361 @group\n\
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362 [i, j] = find (2 * eye (2))\n\
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363 @result{} i = [ 1; 2 ]\n\
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364 @result{} j = [ 1; 2 ]\n\
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365 @end group\n\
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366 @end example\n\
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367 \n\
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368 If three outputs are requested, @code{find} also returns a vector\n\
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369 containing the nonzero values. For example:\n\
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370 \n\
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371 @example\n\
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372 @group\n\
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373 [i, j, v] = find (3 * eye (2))\n\
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374 @result{} i = [ 1; 2 ]\n\
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375 @result{} j = [ 1; 2 ]\n\
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376 @result{} v = [ 3; 3 ]\n\
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377 @end group\n\
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378 @end example\n\
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379 \n\
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380 If two inputs are given, @var{n} indicates the maximum number of\n\
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381 elements to find from the beginning of the matrix or vector.\n\
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382 \n\
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383 If three inputs are given, @var{direction} should be one of \"first\" or\n\
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384 \"last\", requesting only the first or last @var{n} indices, respectively.\n\
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385 However, the indices are always returned in ascending order.\n\
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386 \n\
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387 Note that this function is particularly useful for sparse matrices, as\n\
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388 it extracts the non-zero elements as vectors, which can then be used to\n\
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389 create the original matrix. For example:\n\
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390 \n\
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391 @example\n\
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392 @group\n\
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393 sz = size(a);\n\
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394 [i, j, v] = find (a);\n\
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395 b = sparse(i, j, v, sz(1), sz(2));\n\
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396 @end group\n\
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397 @end example\n\
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398 @seealso{nonzeros}\n\
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399 @end deftypefn")
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400 {
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401 octave_value_list retval;
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402
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403 int nargin = args.length ();
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404
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405 if (nargin > 3 || nargin < 1)
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406 {
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407 print_usage ();
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408 return retval;
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409 }
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410
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411 // Setup the default options.
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412 octave_idx_type n_to_find = -1;
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413 if (nargin > 1)
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414 {
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415 double val = args(1).scalar_value ();
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416
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417 if (error_state || (val < 0 || (! xisinf (val) && val != xround (val))))
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diff changeset
418 {
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419 error ("find: N must be a nonnegative integer");
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420 return retval;
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421 }
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422 else if (! xisinf (val))
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423 n_to_find = val;
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424 }
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425
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426 // Direction to do the searching (1 == forward, -1 == reverse).
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427 int direction = 1;
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428 if (nargin > 2)
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429 {
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
430 direction = 0;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
431
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
432 std::string s_arg = args(2).string_value ();
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 if (! error_state)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
435 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
436 if (s_arg == "first")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
437 direction = 1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
438 else if (s_arg == "last")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
439 direction = -1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
440 }
6002
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 (direction == 0)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
443 {
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
444 error ("find: DIRECTION must be \"first\" or \"last\"");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
445 return retval;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
446 }
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
447 }
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
448
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
449 octave_value arg = args(0);
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
450
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
451 if (arg.is_bool_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
452 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
453 if (arg.is_sparse_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
454 {
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
455 SparseBoolMatrix v = arg.sparse_bool_matrix_value ();
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
456
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
457 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
458 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
459 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
460 }
9544
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
461 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
462 {
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
463 // 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
464 // 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
465 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
466 }
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
467 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
468 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
469 boolNDArray v = arg.bool_array_value ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
470
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
471 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
472 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
473 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
474 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
475 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
476 else if (arg.is_integer_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
477 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
478 #define DO_INT_BRANCH(INTT) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
479 else if (arg.is_ ## INTT ## _type ()) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
480 { \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
481 INTT ## NDArray v = arg.INTT ## _array_value (); \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
482 \
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
483 if (! error_state) \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
484 retval = find_nonzero_elem_idx (v, nargout, \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
485 n_to_find, direction);\
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
486 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
487
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
488 if (false)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
489 ;
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
490 DO_INT_BRANCH (int8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
491 DO_INT_BRANCH (int16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
492 DO_INT_BRANCH (int32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
493 DO_INT_BRANCH (int64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
494 DO_INT_BRANCH (uint8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
495 DO_INT_BRANCH (uint16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
496 DO_INT_BRANCH (uint32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
497 DO_INT_BRANCH (uint64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
498 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
499 panic_impossible ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
500 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
501 else if (arg.is_sparse_type ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
502 {
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
503 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
504 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
505 SparseMatrix v = arg.sparse_matrix_value ();
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
506
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
507 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
508 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
509 n_to_find, direction);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
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 else if (arg.is_complex_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 SparseComplexMatrix v = arg.sparse_complex_matrix_value ();
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
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 }
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
519 else
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
520 gripe_wrong_type_arg ("find", arg);
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
diff changeset
521 }
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
522 else if (arg.is_perm_matrix ())
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
523 {
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
524 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
525
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
526 if (! error_state)
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
527 retval = find_nonzero_elem_idx (P, nargout, n_to_find, direction);
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
528 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
529 else if (arg.is_string ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
530 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
531 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
532
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
533 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
534 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
535 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
536 else if (arg.is_single_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
537 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
538 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
539 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
540 FloatNDArray nda = arg.float_array_value ();
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7505
diff changeset
541
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
542 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
543 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
544 direction);
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 else if (arg.is_complex_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
547 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
548 FloatComplexNDArray cnda = arg.float_complex_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 (cnda, nargout, n_to_find,
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
552 direction);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
553 }
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
554 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
555 else if (arg.is_real_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
556 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
557 NDArray nda = arg.array_value ();
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
558
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
559 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
560 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
561 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
562 else if (arg.is_complex_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
563 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
564 ComplexNDArray cnda = arg.complex_array_value ();
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
565
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
566 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
567 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
568 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
569 else
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
570 gripe_wrong_type_arg ("find", arg);
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
571
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
572 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
573 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
574
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
575 /*
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
576 %!assert(find (char ([0, 97])), 2);
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
577 %!assert(find ([1, 0, 1, 0, 1]), [1, 3, 5]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
578 %!assert(find ([1; 0; 3; 0; 1]), [1; 3; 5]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
579 %!assert(find ([0, 0, 2; 0, 3, 0; -1, 0, 0]), [3; 5; 7]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
580
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
581 %!test
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
582 %! [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
583 %!
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
584 %! assert(i, [3; 2; 1]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
585 %! assert(j, [1; 2; 3]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
586 %! assert(v, [-1; 3; 2]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
587
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
588 %!assert(find (single([1, 0, 1, 0, 1])), [1, 3, 5]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
589 %!assert(find (single([1; 0; 3; 0; 1])), [1; 3; 5]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
590 %!assert(find (single([0, 0, 2; 0, 3, 0; -1, 0, 0])), [3; 5; 7]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
591
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
592 %!test
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
593 %! [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
594 %!
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
595 %! assert(i, [3; 2; 1]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
596 %! assert(j, [1; 2; 3]);
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
597 %! assert(v, single([-1; 3; 2]));
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
598
8955
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
599 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
600 %! 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
601 %! P = eye (5) (:, pcol);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
602 %! [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
603 %! [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
604 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
605 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
606 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
607
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
608 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
609 %! 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
610 %! P = eye (5) (prow, :);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
611 %! [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
612 %! [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
613 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
614 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
615 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
616
9310
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
617 %!assert (find ([2 0 1 0 5 0], 1), 1)
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
618 %!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
619
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
620 %!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
621 %!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
622
7814
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
623 %!error <Invalid call to find.*> find ();
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
624
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
625 */