Matrix.i

   1 %module Matrix
   2 %typemap(in) gsl_vector const * {
   3     printf("gsl_vector_view const *\n");
   4 }
   5
   6 FILE *fopen(char *, char *);
   7 int fclose(FILE *);
   8
   9 %apply int *INOUT { size_t *imin, size_t *imax, size_t *jmin, size_t *jmax };
  10
  11 %apply double *INOUT { double * min_out, double * max_out };
  12 %{
  13     #include "/usr/local/include/gsl/gsl_matrix.h"
  14     #include "/usr/local/include/gsl/gsl_matrix_double.h"
  15     #include "/usr/local/include/gsl/gsl_matrix_int.h"
  16     #include "/usr/local/include/gsl/gsl_matrix_complex_double.h"
  17     #include "/usr/local/include/gsl/gsl_matrix_char.h"
  18 %}
  19
  20 %include "/usr/local/include/gsl/gsl_matrix.h"
  21 %include "/usr/local/include/gsl/gsl_matrix_double.h"
  22 %include "/usr/local/include/gsl/gsl_matrix_int.h"
  23 %include "/usr/local/include/gsl/gsl_matrix_complex_double.h"
  24 %include "/usr/local/include/gsl/gsl_matrix_char.h"
  25
  26
  27 %perlcode %{
  28
  29 no warnings 'redefine';
  30
  31 @EXPORT_OK = qw/fopen fclose
  32         gsl_matrix_alloc gsl_matrix_calloc gsl_matrix_alloc_from_block
  33         gsl_matrix_alloc_from_matrix gsl_vector_alloc_row_from_matrix
  34         gsl_vector_alloc_col_from_matrix gsl_matrix_free gsl_matrix_submatrix
  35         gsl_matrix_row gsl_matrix_column gsl_matrix_diagonal
  36         gsl_matrix_subdiagonal gsl_matrix_superdiagonal gsl_matrix_subrow
  37         gsl_matrix_subcolumn gsl_matrix_view_array
  38         gsl_matrix_view_array_with_tda gsl_matrix_view_vector
  39         gsl_matrix_view_vector_with_tda gsl_matrix_const_submatrix
  40         gsl_matrix_const_row gsl_matrix_const_column gsl_matrix_const_diagonal
  41         gsl_matrix_const_subdiagonal gsl_matrix_const_superdiagonal
  42         gsl_matrix_const_subrow gsl_matrix_const_subcolumn
  43         gsl_matrix_const_view_array gsl_matrix_const_view_array_with_tda
  44         gsl_matrix_const_view_vector gsl_matrix_const_view_vector_with_tda
  45         gsl_matrix_get gsl_matrix_set gsl_matrix_ptr gsl_matrix_const_ptr
  46         gsl_matrix_set_zero gsl_matrix_set_identity gsl_matrix_set_all
  47         gsl_matrix_fread gsl_matrix_fwrite gsl_matrix_fscanf gsl_matrix_fprintf
  48         gsl_matrix_memcpy gsl_matrix_swap gsl_matrix_swap_rows
  49         gsl_matrix_swap_columns gsl_matrix_swap_rowcol gsl_matrix_transpose
  50         gsl_matrix_transpose_memcpy gsl_matrix_max gsl_matrix_min
  51         gsl_matrix_minmax gsl_matrix_max_index gsl_matrix_min_index
  52         gsl_matrix_minmax_index gsl_matrix_isnull gsl_matrix_ispos
  53         gsl_matrix_isneg gsl_matrix_isnonneg gsl_matrix_add gsl_matrix_sub
  54         gsl_matrix_mul_elements gsl_matrix_div_elements gsl_matrix_scale
  55         gsl_matrix_add_constant gsl_matrix_add_diagonal
  56         gsl_matrix_char_alloc gsl_matrix_char_calloc  gsl_matrix_char_alloc_from_block
  57         gsl_matrix_char_alloc_from_matrix gsl_vector_char_alloc_row_from_matrix gsl_vector_char_alloc_col_from_matrix
  58         gsl_matrix_char_free gsl_matrix_char_submatrix
  59         gsl_matrix_char_row  gsl_matrix_char_column
  60         gsl_matrix_char_diagonal gsl_matrix_char_subdiagonal gsl_matrix_char_superdiagonal
  61         gsl_matrix_char_subrow gsl_matrix_char_subcolumn gsl_matrix_char_view_array
  62         gsl_matrix_char_view_array_with_tda gsl_matrix_char_view_vector gsl_matrix_char_view_vector_with_tda
  63         gsl_matrix_char_const_submatrix gsl_matrix_char_const_row gsl_matrix_char_const_column
  64         gsl_matrix_char_const_diagonal gsl_matrix_char_const_subdiagonal gsl_matrix_char_const_superdiagonal
  65         gsl_matrix_char_const_subrow gsl_matrix_char_const_subcolumn gsl_matrix_char_const_view_array
  66         gsl_matrix_char_const_view_array_with_tda gsl_matrix_char_const_view_vector gsl_matrix_char_const_view_vector_with_tda
  67         gsl_matrix_char_get gsl_matrix_char_set gsl_matrix_char_ptr gsl_matrix_char_const_ptr
  68         gsl_matrix_char_set_zero gsl_matrix_char_set_identity
  69         gsl_matrix_char_set_all  gsl_matrix_char_fread
  70         gsl_matrix_char_fwrite gsl_matrix_char_fscanf gsl_matrix_char_fprintf
  71         gsl_matrix_char_memcpy gsl_matrix_char_swap
  72         gsl_matrix_char_swap_rows gsl_matrix_char_swap_columns
  73         gsl_matrix_char_swap_rowcol gsl_matrix_char_transpose gsl_matrix_char_transpose_memcpy
  74         gsl_matrix_char_max gsl_matrix_char_min
  75         gsl_matrix_char_minmax  gsl_matrix_char_max_index
  76         gsl_matrix_char_min_index gsl_matrix_char_minmax_index
  77         gsl_matrix_char_isnull gsl_matrix_char_ispos gsl_matrix_char_isneg
  78         gsl_matrix_char_isnonneg  gsl_matrix_char_add
  79         gsl_matrix_char_sub gsl_matrix_char_mul_elements gsl_matrix_char_div_elements
  80         gsl_matrix_char_scale gsl_matrix_char_add_constant gsl_matrix_char_add_diagonal
  81         gsl_matrix_int_alloc gsl_matrix_int_calloc gsl_matrix_int_alloc_from_block
  82         gsl_matrix_int_alloc_from_matrix gsl_vector_int_alloc_row_from_matrix gsl_vector_int_alloc_col_from_matrix
  83         gsl_matrix_int_free gsl_matrix_int_submatrix gsl_matrix_int_row
  84         gsl_matrix_int_column gsl_matrix_int_diagonal gsl_matrix_int_subdiagonal
  85         gsl_matrix_int_superdiagonal gsl_matrix_int_subrow gsl_matrix_int_subcolumn gsl_matrix_int_view_array
  86         gsl_matrix_int_view_array_with_tda gsl_matrix_int_view_vector gsl_matrix_int_view_vector_with_tda
  87         gsl_matrix_int_const_submatrix gsl_matrix_int_const_row gsl_matrix_int_const_column
  88         gsl_matrix_int_const_diagonal gsl_matrix_int_const_subdiagonal gsl_matrix_int_const_superdiagonal
  89         gsl_matrix_int_const_subrow gsl_matrix_int_const_subcolumn gsl_matrix_int_const_view_array
  90         gsl_matrix_int_const_view_array_with_tda gsl_matrix_int_const_view_vector gsl_matrix_int_const_view_vector_with_tda
  91         gsl_matrix_int_get gsl_matrix_int_set
  92         gsl_matrix_int_ptr gsl_matrix_int_const_ptr
  93         gsl_matrix_int_set_zero gsl_matrix_int_set_identity gsl_matrix_int_set_all
  94         gsl_matrix_int_fread gsl_matrix_int_fwrite
  95         gsl_matrix_int_fscanf gsl_matrix_int_fprintf
  96         gsl_matrix_int_memcpy gsl_matrix_int_swap
  97         gsl_matrix_int_swap_rows gsl_matrix_int_swap_columns gsl_matrix_int_swap_rowcol
  98         gsl_matrix_int_transpose gsl_matrix_int_transpose_memcpy
  99         gsl_matrix_int_max gsl_matrix_int_min gsl_matrix_int_minmax
 100         gsl_matrix_int_max_index gsl_matrix_int_min_index
 101         gsl_matrix_int_minmax_index  gsl_matrix_int_isnull
 102         gsl_matrix_int_ispos gsl_matrix_int_isneg gsl_matrix_int_isnonneg
 103         gsl_matrix_int_add gsl_matrix_int_sub
 104         gsl_matrix_int_mul_elements gsl_matrix_int_div_elements gsl_matrix_int_scale
 105         gsl_matrix_int_add_constant gsl_matrix_int_add_diagonal
 106         gsl_matrix_get_row gsl_matrix_get_col gsl_matrix_set_row gsl_matrix_set_col
 107 /;
 108 %EXPORT_TAGS = ( all => [ @EXPORT_OK ], char => [gsl_matrix_char_alloc, gsl_matrix_char_calloc, gsl_matrix_char_alloc_from_block, gsl_matrix_char_alloc_from_matrix, gsl_vector_char_alloc_row_from_matrix, gsl_vector_char_alloc_col_from_matrix, gsl_matrix_char_free, gsl_matrix_char_submatrix, gsl_matrix_char_row,  gsl_matrix_char_column, gsl_matrix_char_diagonal, gsl_matrix_char_subdiagonal, gsl_matrix_char_superdiagonal, gsl_matrix_char_subrow, gsl_matrix_char_subcolumn, gsl_matrix_char_view_array, gsl_matrix_char_view_array_with_tda, gsl_matrix_char_view_vector, gsl_matrix_char_view_vector_with_tda, gsl_matrix_char_const_submatrix, gsl_matrix_char_const_row, gsl_matrix_char_const_column, gsl_matrix_char_const_diagonal, gsl_matrix_char_const_subdiagonal, gsl_matrix_char_const_superdiagonal, gsl_matrix_char_const_subrow, gsl_matrix_char_const_subcolumn, gsl_matrix_char_const_view_array, gsl_matrix_char_const_view_array_with_tda, gsl_matrix_char_const_view_vector, gsl_matrix_char_const_view_vector_with_tda, gsl_matrix_char_get, gsl_matrix_char_set, gsl_matrix_char_ptr, gsl_matrix_char_const_ptr, gsl_matrix_char_set_zero, gsl_matrix_char_set_identity, gsl_matrix_char_set_all,  gsl_matrix_char_fread, gsl_matrix_char_fwrite, gsl_matrix_char_fscanf, gsl_matrix_char_fprintf, gsl_matrix_char_memcpy, gsl_matrix_char_swap, gsl_matrix_char_swap_rows, gsl_matrix_char_swap_columns, gsl_matrix_char_swap_rowcol, gsl_matrix_char_transpose, gsl_matrix_char_transpose_memcpy, gsl_matrix_char_max, gsl_matrix_char_min, gsl_matrix_char_minmax,  gsl_matrix_char_max_index, gsl_matrix_char_min_index, gsl_matrix_char_minmax_index, gsl_matrix_char_isnull, gsl_matrix_char_ispos, gsl_matrix_char_isneg, gsl_matrix_char_isnonneg, gsl_matrix_char_add, gsl_matrix_char_sub, gsl_matrix_char_mul_elements, gsl_matrix_char_div_elements, gsl_matrix_char_scale, gsl_matrix_char_add_constant, gsl_matrix_char_add_diagonal], double => [ gsl_matrix_alloc, gsl_matrix_calloc, gsl_matrix_alloc_from_block, gsl_matrix_alloc_from_matrix, gsl_vector_alloc_row_from_matrix, gsl_vector_alloc_col_from_matrix, gsl_matrix_free, gsl_matrix_submatrix, gsl_matrix_row, gsl_matrix_column, gsl_matrix_diagonal, gsl_matrix_subdiagonal, gsl_matrix_superdiagonal, gsl_matrix_subrow, gsl_matrix_subcolumn, gsl_matrix_view_array, gsl_matrix_view_array_with_tda, gsl_matrix_view_vector, gsl_matrix_view_vector_with_tda, gsl_matrix_const_submatrix, gsl_matrix_const_row, gsl_matrix_const_column, gsl_matrix_const_diagonal, gsl_matrix_const_subdiagonal, gsl_matrix_const_superdiagonal, gsl_matrix_const_subrow, gsl_matrix_const_subcolumn, gsl_matrix_const_view_array, gsl_matrix_const_view_array_with_tda, gsl_matrix_const_view_vector, gsl_matrix_const_view_vector_with_tda, gsl_matrix_get, gsl_matrix_set, gsl_matrix_ptr, gsl_matrix_const_ptr, gsl_matrix_set_zero, gsl_matrix_set_identity, gsl_matrix_set_all, gsl_matrix_fread, gsl_matrix_fwrite, gsl_matrix_fscanf, gsl_matrix_fprintf, gsl_matrix_memcpy, gsl_matrix_swap, gsl_matrix_swap_rows, gsl_matrix_swap_columns, gsl_matrix_swap_rowcol, gsl_matrix_transpose, gsl_matrix_transpose_memcpy, gsl_matrix_max, gsl_matrix_minmax, gsl_matrix_max_index, gsl_matrix_min_index, gsl_matrix_minmax_index, gsl_matrix_isnull, gsl_matrix_ispos, gsl_matrix_isneg, gsl_matrix_isnonneg, gsl_matrix_add, gsl_matrix_mul_elements, gsl_matrix_div_elements, gsl_matrix_scale, gsl_matrix_add_constant, gsl_matrix_add_diagonal], int => [gsl_matrix_int_alloc, gsl_matrix_int_alloc_from_matrix, gsl_matrix_int_free, gsl_matrix_int_column, gsl_matrix_int_superdiagonal, gsl_matrix_int_view_array_with_tda, gsl_matrix_int_const_submatrix, gsl_matrix_int_const_diagonal, gsl_matrix_int_const_subrow, gsl_matrix_int_const_view_array_with_tda, gsl_matrix_int_get, gsl_matrix_int_ptr, gsl_matrix_int_set_zero, gsl_matrix_int_fread, gsl_matrix_int_fscanf, gsl_matrix_int_memcpy, gsl_matrix_int_swap_rows, gsl_matrix_int_transpose, gsl_matrix_int_max, gsl_matrix_int_max_index, gsl_matrix_int_minmax_index, gsl_matrix_int_ispos, gsl_matrix_int_add, gsl_matrix_int_mul_elements, gsl_matrix_int_add_constant]);
 109
 110 __END__
 111
 112 =head1 NAME
 113
 114 Math::GSL::Matrix
 115 Mathematical functions concerning Matrices
 116
 117 =head1 SYPNOPSIS
 118
 119 use Math::GSL::Matrix qw/:all/;
 120
 121 =head1 DESCRIPTION
 122
 123 Here is a list of all the functions included in this module :
 124
 125 gsl_matrix_alloc gsl_matrix_calloc gsl_matrix_alloc_from_block
 126 gsl_matrix_alloc_from_matrix gsl_vector_alloc_row_from_matrix
 127 gsl_vector_alloc_col_from_matrix gsl_matrix_free gsl_matrix_submatrix
 128 gsl_matrix_row gsl_matrix_column gsl_matrix_diagonal
 129 gsl_matrix_subdiagonal gsl_matrix_superdiagonal gsl_matrix_subrow
 130 gsl_matrix_subcolumn gsl_matrix_view_array
 131 gsl_matrix_view_array_with_tda gsl_matrix_view_vector
 132 gsl_matrix_view_vector_with_tda gsl_matrix_const_submatrix
 133 gsl_matrix_const_row gsl_matrix_const_column gsl_matrix_const_diagonal
 134 gsl_matrix_const_subdiagonal gsl_matrix_const_superdiagonal
 135 gsl_matrix_const_subrow gsl_matrix_const_subcolumn
 136 gsl_matrix_const_view_array gsl_matrix_const_view_array_with_tda
 137 gsl_matrix_const_view_vector gsl_matrix_const_view_vector_with_tda
 138 gsl_matrix_get gsl_matrix_set gsl_matrix_ptr gsl_matrix_const_ptr
 139 gsl_matrix_set_zero gsl_matrix_set_identity gsl_matrix_set_all
 140 gsl_matrix_fread gsl_matrix_fwrite gsl_matrix_fscanf gsl_matrix_fprintf
 141 gsl_matrix_memcpy gsl_matrix_swap gsl_matrix_swap_rows
 142 gsl_matrix_swap_columns gsl_matrix_swap_rowcol gsl_matrix_transpose
 143 gsl_matrix_transpose_memcpy gsl_matrix_max gsl_matrix_min
 144 gsl_matrix_minmax gsl_matrix_max_index gsl_matrix_min_index
 145 gsl_matrix_minmax_index gsl_matrix_isnull gsl_matrix_ispos
 146 gsl_matrix_isneg gsl_matrix_isnonneg gsl_matrix_add gsl_matrix_sub
 147 gsl_matrix_mul_elements gsl_matrix_div_elements gsl_matrix_scale
 148 gsl_matrix_add_constant gsl_matrix_add_diagonal
 149 gsl_matrix_char_alloc gsl_matrix_char_calloc  gsl_matrix_char_alloc_from_block
 150 gsl_matrix_char_alloc_from_matrix gsl_vector_char_alloc_row_from_matrix gsl_vector_char_alloc_col_from_matrix
 151 gsl_matrix_char_free gsl_matrix_char_submatrix
 152 gsl_matrix_char_row  gsl_matrix_char_column
 153 gsl_matrix_char_diagonal gsl_matrix_char_subdiagonal gsl_matrix_char_superdiagonal
 154 gsl_matrix_char_subrow gsl_matrix_char_subcolumn gsl_matrix_char_view_array
 155 gsl_matrix_char_view_array_with_tda gsl_matrix_char_view_vector gsl_matrix_char_view_vector_with_tda
 156 gsl_matrix_char_const_submatrix gsl_matrix_char_const_row gsl_matrix_char_const_column
 157 gsl_matrix_char_const_diagonal gsl_matrix_char_const_subdiagonal gsl_matrix_char_const_superdiagonal
 158 gsl_matrix_char_const_subrow gsl_matrix_char_const_subcolumn gsl_matrix_char_const_view_array
 159 gsl_matrix_char_const_view_array_with_tda gsl_matrix_char_const_view_vector gsl_matrix_char_const_view_vector_with_tda
 160 gsl_matrix_char_get gsl_matrix_char_set gsl_matrix_char_ptr gsl_matrix_char_const_ptr
 161 gsl_matrix_char_set_zero gsl_matrix_char_set_identity
 162 gsl_matrix_char_set_all  gsl_matrix_char_fread
 163 gsl_matrix_char_fwrite gsl_matrix_char_fscanf gsl_matrix_char_fprintf
 164 gsl_matrix_char_memcpy gsl_matrix_char_swap
 165 gsl_matrix_char_swap_rows gsl_matrix_char_swap_columns
 166 gsl_matrix_char_swap_rowcol gsl_matrix_char_transpose gsl_matrix_char_transpose_memcpy
 167 gsl_matrix_char_max gsl_matrix_char_min
 168 gsl_matrix_char_minmax  gsl_matrix_char_max_index
 169 gsl_matrix_char_min_index gsl_matrix_char_minmax_index
 170 gsl_matrix_char_isnull gsl_matrix_char_ispos gsl_matrix_char_isneg
 171 gsl_matrix_char_isnonneg  gsl_matrix_char_add
 172 gsl_matrix_char_sub gsl_matrix_char_mul_elements gsl_matrix_char_div_elements
 173 gsl_matrix_char_scale gsl_matrix_char_add_constant gsl_matrix_char_add_diagonal
 174 gsl_matrix_int_alloc gsl_matrix_int_calloc gsl_matrix_int_alloc_from_block
 175 gsl_matrix_int_alloc_from_matrix gsl_vector_int_alloc_row_from_matrix gsl_vector_int_alloc_col_from_matrix
 176 gsl_matrix_int_free gsl_matrix_int_submatrix gsl_matrix_int_row
 177 gsl_matrix_int_column gsl_matrix_int_diagonal gsl_matrix_int_subdiagonal
 178 gsl_matrix_int_superdiagonal gsl_matrix_int_subrow gsl_matrix_int_subcolumn gsl_matrix_int_view_array
 179 gsl_matrix_int_view_array_with_tda gsl_matrix_int_view_vector gsl_matrix_int_view_vector_with_tda
 180 gsl_matrix_int_const_submatrix gsl_matrix_int_const_row gsl_matrix_int_const_column
 181 gsl_matrix_int_const_diagonal gsl_matrix_int_const_subdiagonal gsl_matrix_int_const_superdiagonal
 182 gsl_matrix_int_const_subrow gsl_matrix_int_const_subcolumn gsl_matrix_int_const_view_array
 183 gsl_matrix_int_const_view_array_with_tda gsl_matrix_int_const_view_vector gsl_matrix_int_const_view_vector_with_tda
 184 gsl_matrix_int_get gsl_matrix_int_set
 185 gsl_matrix_int_ptr gsl_matrix_int_const_ptr
 186 gsl_matrix_int_set_zero gsl_matrix_int_set_identity gsl_matrix_int_set_all
 187 gsl_matrix_int_fread gsl_matrix_int_fwrite
 188 gsl_matrix_int_fscanf gsl_matrix_int_fprintf
 189 gsl_matrix_int_memcpy gsl_matrix_int_swap
 190 gsl_matrix_int_swap_rows gsl_matrix_int_swap_columns gsl_matrix_int_swap_rowcol
 191 gsl_matrix_int_transpose gsl_matrix_int_transpose_memcpy
 192 gsl_matrix_int_max gsl_matrix_int_min gsl_matrix_int_minmax
 193 gsl_matrix_int_max_index gsl_matrix_int_min_index
 194 gsl_matrix_int_minmax_index  gsl_matrix_int_isnull
 195 gsl_matrix_int_ispos gsl_matrix_int_isneg gsl_matrix_int_isnonneg
 196 gsl_matrix_int_add gsl_matrix_int_sub
 197 gsl_matrix_int_mul_elements gsl_matrix_int_div_elements gsl_matrix_int_scale
 198 gsl_matrix_int_add_constant gsl_matrix_int_add_diagonal
 199 gsl_matrix_get_row gsl_matrix_get_col gsl_matrix_set_row gsl_matrix_set_col
 200
 201 You have to add the functions you want to use inside the qw /put_funtion_here /. You can also write use Math::GSL::PowInt qw/:name_of_tag/ to use all avaible functions of the module. Other tags are also avaible, here is a complete list of all tags for this module :
 202
 203 all
 204 int
 205 double
 206 char
 207
 208 For more informations on the functions, we refer you to the GSL offcial documentation: http://www.gnu.org/software/gsl/manual/html_node/
 209 Tip : search on google: site:http://www.gnu.org/software/gsl/manual/html_node/name_of_the_function_you_want
 210
 211 =head1 EXAMPLES
 212
 213 Most of the examples from this section are perl versions of the examples there : http://www.gnu.org/software/gsl/manual/html_node/Example-programs-for-matrices.html
 214
 215
 216 The program below shows how to allocate, initialize and read from a matrix using the functions gsl_matrix_alloc, gsl_matrix_set and gsl_matrix_get.
 217
 218 use Math::GSL::Matrix qw/:all/;
 219 $m = gsl_matrix_alloc (10,3);
 220 for($i = 0; $i< 10; $i++){
 221     for($j = 0; $j<3; $j++){
 222         gsl_matrix_set($m, $i, $j, 0.23 + 100*$i + $j);
 223     }
 224 }
 225 for($i = 0; $i< 100; $i++){ # OUT OF RANGE ERROR
 226     for($j=0; $j<3; $j++){
 227         print "m($i, $j) = " . gsl_matrix_get ($m, $i, $j) . "\n";
 228     }
 229 }
 230 gsl_matrix_free ($m);
 231
 232
 233 use Math::GSL::Matrix qw/:all/;
 234
 235 $m = gsl_matrix_alloc (100, 100);
 236 $a = gsl_matrix_alloc (100, 100);
 237
 238 for($i = 0; $i < 100; $i++){
 239     for($j = 0; $j < 100; $j++){
 240         gsl_matrix_set ($m, $i, $j, 0.23 + $i + $j);
 241     }
 242 }
 243
 244 The next program shows how to write a matrix to a file.
 245
 246 $out = fopen("test.dat", "wb");
 247 gsl_matrix_fwrite ($out, $m);
 248 fclose ($out);
 249
 250 $in = fopen("test.dat", "rb");
 251 gsl_matrix_fread ($in, $a);
 252 fclose($in);
 253
 254 $k=0;
 255 for($i = 0; $i < 100; $i++){
 256     for($j = 0; $j < 100; $j++){
 257         $mij = gsl_matrix_get ($m, $i, $j);
 258         $aij = gsl_matrix_get ($a, $i, $j);
 259         if ($mij != $aij){ $k++ };
 260     }
 261 }
 262
 263 gsl_matrix_free($m);
 264 gsl_matrix_free($a);
 265
 266 print "differences = $k (should be zero)\n";
 267
 268 =head1 AUTHOR
 269
 270 Jonathan Leto <jonathan@leto.net> and Thierry Moisan <thierry.moisan@gmail.com>
 271
 272 =head1 COPYRIGHT AND LICENSE
 273
 274 Copyright (C) 2008 Jonathan Leto and Thierry Moisan
 275
 276 This program is free software; you can redistribute it and/or modify it
 277 under the same terms as Perl itself.
 278
 279 =cut
 280 %}