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annotate libinterp/corefcn/find.cc @ 18677:6113e0c6920b

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maint: Clean up extra spaces before/after parentheses.
author Rik <rik@octave.org>
date Fri, 25 Apr 2014 13:25:25 -0700
parents 5bd1ca29c5f0
children 888f8ce79bbe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
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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
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
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93 octave_idx_type nc = v.cols ();
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94 octave_idx_type nr = v.rows ();
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95 octave_idx_type nz = v.nnz ();
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96
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97 // Search in the default range.
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98 octave_idx_type start_nc = -1;
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99 octave_idx_type end_nc = -1;
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100 octave_idx_type count;
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101
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102 // Search for the range to search
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103 if (n_to_find < 0)
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104 {
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105 start_nc = 0;
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106 end_nc = nc;
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107 n_to_find = nz;
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108 count = nz;
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109 }
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110 else if (direction > 0)
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111 {
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112 for (octave_idx_type j = 0; j < nc; j++)
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113 {
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114 OCTAVE_QUIT;
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115 if (v.cidx (j) == 0 && v.cidx (j+1) != 0)
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116 start_nc = j;
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117 if (v.cidx (j+1) >= n_to_find)
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118 {
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119 end_nc = j + 1;
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120 break;
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121 }
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122 }
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123 }
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124 else
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125 {
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126 for (octave_idx_type j = nc; j > 0; j--)
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127 {
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128 OCTAVE_QUIT;
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129 if (v.cidx (j) == nz && v.cidx (j-1) != nz)
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130 end_nc = j;
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131 if (nz - v.cidx (j-1) >= n_to_find)
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132 {
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133 start_nc = j - 1;
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134 break;
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135 }
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136 }
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137 }
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138
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139 count = (n_to_find > v.cidx (end_nc) - v.cidx (start_nc) ?
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140 v.cidx (end_nc) - v.cidx (start_nc) : n_to_find);
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141
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142 // If the original argument was a row vector, force a row vector of
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143 // the overall indices to be returned. But see below for scalar
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144 // case...
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145
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146 octave_idx_type result_nr = count;
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147 octave_idx_type result_nc = 1;
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148
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149 bool scalar_arg = false;
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150
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151 if (v.rows () == 1)
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152 {
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153 result_nr = 1;
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154 result_nc = count;
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155
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156 scalar_arg = (v.columns () == 1);
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157 }
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158
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159 Matrix idx (result_nr, result_nc);
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160
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161 Matrix i_idx (result_nr, result_nc);
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162 Matrix j_idx (result_nr, result_nc);
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163
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164 Array<T> val (dim_vector (result_nr, result_nc));
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165
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166 if (count > 0)
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167 {
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168 // Search for elements to return. Only search the region where
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169 // there are elements to be found using the count that we want
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170 // to find.
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171 for (octave_idx_type j = start_nc, cx = 0; j < end_nc; j++)
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172 for (octave_idx_type i = v.cidx (j); i < v.cidx (j+1); i++)
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173 {
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174 OCTAVE_QUIT;
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175 if (direction < 0 && i < nz - count)
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176 continue;
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177 i_idx(cx) = static_cast<double> (v.ridx (i) + 1);
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178 j_idx(cx) = static_cast<double> (j + 1);
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179 idx(cx) = j * nr + v.ridx (i) + 1;
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180 val(cx) = v.data(i);
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181 cx++;
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182 if (cx == count)
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183 break;
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184 }
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185 }
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186 else if (scalar_arg)
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187 {
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188 idx.resize (0, 0);
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189
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190 i_idx.resize (0, 0);
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191 j_idx.resize (0, 0);
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192
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193 val.resize (dim_vector (0, 0));
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194 }
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195
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196 switch (nargout)
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197 {
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198 case 0:
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199 case 1:
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200 retval(0) = idx;
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201 break;
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202
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203 case 5:
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204 retval(4) = nc;
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205 // Fall through
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206
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207 case 4:
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208 retval(3) = nr;
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209 // Fall through
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210
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211 case 3:
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212 retval(2) = val;
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213 // Fall through!
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214
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215 case 2:
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216 retval(1) = j_idx;
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217 retval(0) = i_idx;
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218 break;
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219
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diff changeset
220 default:
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221 panic_impossible ();
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222 break;
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223 }
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224
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225 return retval;
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226 }
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227
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228 octave_value_list
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diff changeset
229 find_nonzero_elem_idx (const PermMatrix& v, int nargout,
10154
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230 octave_idx_type n_to_find, int direction)
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231 {
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232 // There are far fewer special cases to handle for a PermMatrix.
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diff changeset
233 octave_value_list retval ((nargout == 0 ? 1 : nargout), Matrix ());
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diff changeset
234
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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
235 octave_idx_type nc = v.cols ();
13219
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diff changeset
236 octave_idx_type start_nc, count;
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diff changeset
237
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diff changeset
238 // Determine the range to search.
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diff changeset
239 if (n_to_find < 0 || n_to_find >= nc)
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diff changeset
240 {
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diff changeset
241 start_nc = 0;
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diff changeset
242 count = nc;
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diff changeset
243 }
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diff changeset
244 else if (direction > 0)
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diff changeset
245 {
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diff changeset
246 start_nc = 0;
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diff changeset
247 count = n_to_find;
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diff changeset
248 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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parents: 8920
diff changeset
249 else
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Jason Riedy <jason@acm.org>
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diff changeset
250 {
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Jason Riedy <jason@acm.org>
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diff changeset
251 start_nc = nc - n_to_find;
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diff changeset
252 count = n_to_find;
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diff changeset
253 }
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
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diff changeset
254
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diff changeset
255 bool scalar_arg = (v.rows () == 1 && v.cols () == 1);
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diff changeset
256
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
257 Matrix idx (count, 1);
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Jason Riedy <jason@acm.org>
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diff changeset
258 Matrix i_idx (count, 1);
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Jason Riedy <jason@acm.org>
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diff changeset
259 Matrix j_idx (count, 1);
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diff changeset
260 // Every value is 1.
9732
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Jaroslav Hajek <highegg@gmail.com>
parents: 9544
diff changeset
261 Array<double> val (dim_vector (count, 1), 1.0);
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diff changeset
262
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Jason Riedy <jason@acm.org>
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diff changeset
263 if (count > 0)
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Jason Riedy <jason@acm.org>
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diff changeset
264 {
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
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diff changeset
265 const octave_idx_type* p = v.data ();
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Jason Riedy <jason@acm.org>
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diff changeset
266 if (v.is_col_perm ())
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Jason Riedy <jason@acm.org>
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diff changeset
267 {
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diff changeset
268 for (octave_idx_type k = 0; k < count; k++)
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diff changeset
269 {
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diff changeset
270 OCTAVE_QUIT;
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diff changeset
271 const octave_idx_type j = start_nc + k;
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diff changeset
272 const octave_idx_type i = p[j];
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diff changeset
273 i_idx(k) = static_cast<double> (1+i);
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diff changeset
274 j_idx(k) = static_cast<double> (1+j);
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diff changeset
275 idx(k) = j * nc + i + 1;
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diff changeset
276 }
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diff changeset
277 }
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diff changeset
278 else
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
279 {
11586
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diff changeset
280 for (octave_idx_type k = 0; k < count; k++)
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281 {
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282 OCTAVE_QUIT;
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283 const octave_idx_type i = start_nc + k;
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284 const octave_idx_type j = p[i];
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285 // Scatter into the index arrays according to
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286 // j adjusted by the start point.
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287 const octave_idx_type koff = j - start_nc;
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288 i_idx(koff) = static_cast<double> (1+i);
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289 j_idx(koff) = static_cast<double> (1+j);
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290 idx(koff) = j * nc + i + 1;
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291 }
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292 }
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293 }
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294 else if (scalar_arg)
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295 {
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296 // Same odd compatibility case as the other overrides.
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297 idx.resize (0, 0);
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298 i_idx.resize (0, 0);
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299 j_idx.resize (0, 0);
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300 val.resize (dim_vector (0, 0));
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301 }
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302
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303 switch (nargout)
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304 {
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305 case 0:
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306 case 1:
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307 retval(0) = idx;
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308 break;
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309
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310 case 5:
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311 retval(4) = nc;
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312 // Fall through
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313
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314 case 4:
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315 retval(3) = nc;
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316 // Fall through
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317
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318 case 3:
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319 retval(2) = val;
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320 // Fall through!
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321
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322 case 2:
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323 retval(1) = j_idx;
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324 retval(0) = i_idx;
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325 break;
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326
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327 default:
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328 panic_impossible ();
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329 break;
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330 }
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331
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332 return retval;
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333 }
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334
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335 DEFUN (find, args, nargout,
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336 "-*- texinfo -*-\n\
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337 @deftypefn {Built-in Function} {@var{idx} =} find (@var{x})\n\
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338 @deftypefnx {Built-in Function} {@var{idx} =} find (@var{x}, @var{n})\n\
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339 @deftypefnx {Built-in Function} {@var{idx} =} find (@var{x}, @var{n}, @var{direction})\n\
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340 @deftypefnx {Built-in Function} {[i, j] =} find (@dots{})\n\
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341 @deftypefnx {Built-in Function} {[i, j, v] =} find (@dots{})\n\
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342 Return a vector of indices of nonzero elements of a matrix, as a row if\n\
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343 @var{x} is a row vector or as a column otherwise. To obtain a single index\n\
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344 for each matrix element, Octave pretends that the columns of a matrix form\n\
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345 one long vector (like Fortran arrays are stored). For example:\n\
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346 \n\
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347 @example\n\
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348 @group\n\
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349 find (eye (2))\n\
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350 @result{} [ 1; 4 ]\n\
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351 @end group\n\
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352 @end example\n\
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353 \n\
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354 If two outputs are requested, @code{find} returns the row and column\n\
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355 indices of nonzero elements of a matrix. 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 [i, j] = find (2 * eye (2))\n\
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360 @result{} i = [ 1; 2 ]\n\
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361 @result{} j = [ 1; 2 ]\n\
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362 @end group\n\
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363 @end example\n\
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364 \n\
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365 If three outputs are requested, @code{find} also returns a vector\n\
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366 containing the nonzero values. For example:\n\
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367 \n\
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368 @example\n\
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369 @group\n\
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370 [i, j, v] = find (3 * eye (2))\n\
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371 @result{} i = [ 1; 2 ]\n\
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372 @result{} j = [ 1; 2 ]\n\
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373 @result{} v = [ 3; 3 ]\n\
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374 @end group\n\
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375 @end example\n\
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376 \n\
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377 If two inputs are given, @var{n} indicates the maximum number of\n\
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378 elements to find from the beginning of the matrix or vector.\n\
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379 \n\
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380 If three inputs are given, @var{direction} should be one of\n\
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381 @qcode{\"first\"} or @qcode{\"last\"}, requesting only the first or last\n\
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diff changeset
382 @var{n} indices, respectively. However, the indices are always returned in\n\
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diff changeset
383 ascending order.\n\
7505
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384 \n\
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385 Note that this function is particularly useful for sparse matrices, as\n\
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diff changeset
386 it extracts the non-zero elements as vectors, which can then be used to\n\
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diff changeset
387 create the original matrix. For example:\n\
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388 \n\
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389 @example\n\
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390 @group\n\
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391 sz = size (a);\n\
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392 [i, j, v] = find (a);\n\
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393 b = sparse (i, j, v, sz(1), sz(2));\n\
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394 @end group\n\
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diff changeset
395 @end example\n\
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diff changeset
396 @seealso{nonzeros}\n\
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397 @end deftypefn")
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diff changeset
398 {
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parents:
diff changeset
399 octave_value_list retval;
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parents:
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400
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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parents:
diff changeset
401 int nargin = args.length ();
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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parents:
diff changeset
402
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diff changeset
403 if (nargin > 3 || nargin < 1)
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parents:
diff changeset
404 {
5823
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diff changeset
405 print_usage ();
2928
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parents:
diff changeset
406 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
407 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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parents:
diff changeset
408
6002
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diff changeset
409 // Setup the default options.
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
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diff changeset
410 octave_idx_type n_to_find = -1;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
411 if (nargin > 1)
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
412 {
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diff changeset
413 double val = args(1).scalar_value ();
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diff changeset
414
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diff changeset
415 if (error_state || (val < 0 || (! xisinf (val) && val != xround (val))))
10154
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John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
416 {
14062
5b49cafe0599 Use non-negative, non-positive with hyphens in error messages.
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diff changeset
417 error ("find: N must be a non-negative integer");
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diff changeset
418 return retval;
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diff changeset
419 }
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diff changeset
420 else if (! xisinf (val))
9310
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
421 n_to_find = val;
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
422 }
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
423
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
424 // Direction to do the searching (1 == forward, -1 == reverse).
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
425 int direction = 1;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
426 if (nargin > 2)
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
427 {
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
428 direction = 0;
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
429
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
430 std::string s_arg = args(2).string_value ();
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 if (! error_state)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
433 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
434 if (s_arg == "first")
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
435 direction = 1;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
436 else if (s_arg == "last")
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 }
6002
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 if (direction == 0)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
441 {
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
442 error ("find: DIRECTION must be \"first\" or \"last\"");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
443 return retval;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
444 }
6002
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
445 }
c5d0490aad55 [project @ 2006-09-26 19:45:42 by jwe]
jwe
parents: 5823
diff changeset
446
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
447 octave_value arg = args(0);
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
448
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
449 if (arg.is_bool_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
450 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
451 if (arg.is_sparse_type ())
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
452 {
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
453 SparseBoolMatrix v = arg.sparse_bool_matrix_value ();
9028
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 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
456 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
457 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
458 }
9544
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
459 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
460 {
df0abc63c230 cache/use cached index vector on full find in logical masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9351
diff changeset
461 // 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
462 // 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
463 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
464 }
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
465 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
466 {
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
467 boolNDArray v = arg.bool_array_value ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
468
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
469 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
470 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
471 n_to_find, direction);
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
472 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
473 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
474 else if (arg.is_integer_type ())
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 #define DO_INT_BRANCH(INTT) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
477 else if (arg.is_ ## INTT ## _type ()) \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
478 { \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
479 INTT ## NDArray v = arg.INTT ## _array_value (); \
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
480 \
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
481 if (! error_state) \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
482 retval = find_nonzero_elem_idx (v, nargout, \
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
483 n_to_find, direction);\
9028
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
484 }
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 if (false)
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 DO_INT_BRANCH (int8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
489 DO_INT_BRANCH (int16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
490 DO_INT_BRANCH (int32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
491 DO_INT_BRANCH (int64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
492 DO_INT_BRANCH (uint8)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
493 DO_INT_BRANCH (uint16)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
494 DO_INT_BRANCH (uint32)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
495 DO_INT_BRANCH (uint64)
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
496 else
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
497 panic_impossible ();
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
498 }
e67dc11ed6e8 use Array<T>::find in find
Jaroslav Hajek <highegg@gmail.com>
parents: 9019
diff changeset
499 else if (arg.is_sparse_type ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
500 {
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
501 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
502 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
503 SparseMatrix v = arg.sparse_matrix_value ();
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
504
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
505 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
506 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
507 n_to_find, direction);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
508 }
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7017
diff changeset
509 else if (arg.is_complex_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
510 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
511 SparseComplexMatrix v = arg.sparse_complex_matrix_value ();
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
diff changeset
512
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
513 if (! error_state)
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
514 retval = find_nonzero_elem_idx (v, nargout,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
515 n_to_find, direction);
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
516 }
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
517 else
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
518 gripe_wrong_type_arg ("find", arg);
5107
c891dd97b837 [project @ 2005-01-12 19:49:18 by jwe]
jwe
parents: 4826
diff changeset
519 }
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
520 else if (arg.is_perm_matrix ())
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
521 {
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
522 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
523
10550
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
524 if (! error_state)
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
525 retval = find_nonzero_elem_idx (P, nargout, n_to_find, direction);
c48b7048e720 style fixes
John W. Eaton <jwe@octave.org>
parents: 10338
diff changeset
526 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
527 else if (arg.is_string ())
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
528 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
529 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
530
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
531 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
532 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
533 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
534 else if (arg.is_single_type ())
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 if (arg.is_real_type ())
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
537 {
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
538 FloatNDArray nda = arg.float_array_value ();
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7505
diff changeset
539
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
540 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
541 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
542 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_complex_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 FloatComplexNDArray cnda = arg.float_complex_array_value ();
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7505
diff changeset
547
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
548 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
549 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
550 direction);
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9894
diff changeset
551 }
2928
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
jwe
parents:
diff changeset
552 }
10826
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
553 else if (arg.is_real_type ())
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
554 {
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
555 NDArray nda = arg.array_value ();
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 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
558 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
559 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
560 else if (arg.is_complex_type ())
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 ComplexNDArray cnda = arg.complex_array_value ();
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 if (! error_state)
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
diff changeset
565 retval = find_nonzero_elem_idx (cnda, nargout, n_to_find, direction);
9e6aed3c6704 fix find for character arrays
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parents: 10550
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566 }
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
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567 else
9e6aed3c6704 fix find for character arrays
John W. Eaton <jwe@octave.org>
parents: 10550
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568 gripe_wrong_type_arg ("find", arg);
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569
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570 return retval;
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571 }
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572
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573 /*
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Rik <octave@nomad.inbox5.com>
parents: 14360
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574 %!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
575 %!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
576 %!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
577 %!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
578
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
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579 %!test
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
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580 %! [i, j, v] = find ([0, 0, 2; 0, 3, 0; -1, 0, 0]);
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parents: 11553
diff changeset
581 %!
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parents: 14360
diff changeset
582 %! 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
583 %! 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
584 %! assert (v, [-1; 3; 2]);
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87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
585
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60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
586 %!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
587 %!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
588 %!assert (find (single ([0, 0, 2; 0, 3, 0; -1, 0, 0])), [3; 5; 7])
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David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
589
87865ed7405f Second set of single precision test code and fix of resulting bugs
David Bateman <dbateman@free.fr>
parents: 7789
diff changeset
590 %!test
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parents: 14360
diff changeset
591 %! [i, j, v] = find (single ([0, 0, 2; 0, 3, 0; -1, 0, 0]));
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John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
592 %!
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Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
593 %! 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
594 %! 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
595 %! 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
596
8955
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
597 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
598 %! 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
599 %! P = eye (5) (:, pcol);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
600 %! [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
601 %! [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
602 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
603 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
604 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
605
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
606 %!test
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
607 %! 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
608 %! P = eye (5) (prow, :);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
609 %! [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
610 %! [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
611 %! assert (i, ifull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
612 %! assert (j, jfull);
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
613 %! assert (all (v == 1));
6d3fcbf89267 Add an override to Octave's find() for permutation matrices.
Jason Riedy <jason@acm.org>
parents: 8920
diff changeset
614
9310
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diff changeset
615 %!assert (find ([2 0 1 0 5 0], 1), 1)
256c0db275b6 fix behavior of find
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parents: 9046
diff changeset
616 %!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
617
256c0db275b6 fix behavior of find
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
618 %!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
619 %!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
620
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parents: 14360
diff changeset
621 %!error find ()
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diff changeset
622 */