Permutation.i

   1 %module "Math::GSL::Permutation"
   2 %include "typemaps.i"
   3 %include "gsl_typemaps.i"
   4
   5 int fclose(FILE *);
   6
   7 %{
   8     #include "gsl/gsl_permute.h"
   9     #include "gsl/gsl_permute_double.h"
  10     #include "gsl/gsl_permute_int.h"
  11     #include "gsl/gsl_permute_vector.h"
  12     #include "gsl/gsl_permute_vector_double.h"
  13     #include "gsl/gsl_permute_vector_int.h"
  14     #include "gsl/gsl_permutation.h"
  15 %}
  16 %include "gsl/gsl_permute.h"
  17 %include "gsl/gsl_permute_double.h"
  18 %include "gsl/gsl_permute_int.h"
  19 %include "gsl/gsl_permute_vector.h"
  20 %include "gsl/gsl_permute_vector_double.h"
  21 %include "gsl/gsl_permute_vector_int.h"
  22 %include "gsl/gsl_permutation.h"
  23
  24 %perlcode %{
  25 @EXPORT_OK = qw/fclose
  26                 gsl_permutation_alloc
  27                 gsl_permutation_calloc
  28                 gsl_permutation_init
  29                 gsl_permutation_free
  30                 gsl_permutation_memcpy
  31                 gsl_permutation_fread
  32                 gsl_permutation_fwrite
  33                 gsl_permutation_fscanf
  34                 gsl_permutation_fprintf
  35                 gsl_permutation_size
  36                 gsl_permutation_data
  37                 gsl_permutation_get
  38                 gsl_permutation_swap
  39                 gsl_permutation_valid
  40                 gsl_permutation_reverse
  41                 gsl_permutation_inverse
  42                 gsl_permutation_next
  43                 gsl_permutation_prev
  44                 gsl_permutation_mul
  45                 gsl_permutation_linear_to_canonical
  46                 gsl_permutation_canonical_to_linear
  47                 gsl_permutation_inversions
  48                 gsl_permutation_linear_cycles
  49                 gsl_permutation_canonical_cycles
  50                 gsl_permute
  51                 gsl_permute_inverse
  52                 gsl_permute_int
  53                 gsl_permute_int_inverse
  54                 gsl_permute_vector
  55                 gsl_permute_vector_inverse
  56                 gsl_permute_vector_int
  57                 gsl_permute_vector_int_inverse
  58             /;
  59 %EXPORT_TAGS = ( all => [ @EXPORT_OK ] );
  60
  61 ### wrapper interface ###
  62 sub new {
  63     my ($class, $value) = @_;
  64     my $this = {};
  65     $this->{_length} = $value;
  66     $this->{_permutation} = gsl_permutation_calloc($value);
  67     bless $this, $class;
  68 }
  69
  70 sub as_list {
  71     my $self=shift;
  72     $self->get( [ 0 .. $self->length - 1  ] );
  73 }
  74
  75 sub get {
  76     my ($self, $indices) = @_;
  77     return  map {  gsl_permutation_get($self->{_permutation}, $_ ) } @$indices ;
  78 }
  79
  80 sub raw { (shift)->{_permutation} }
  81 sub length { (shift)->{_length} }
  82
  83
  84
  85
  86 __END__
  87
  88 =head1 NAME
  89
  90 Math::GSL::Permutation - functions for creating and manipulating permutations
  91
  92 =head1 SYNOPSIS
  93
  94  use Math::GSL::Permutation qw/:all/;
  95  my $permutation = Math::GSL::Permutation->new(30); # allocate and initialize a permutation of size 30
  96  my $lenght = $permutation->lenght; # returns the lenght of the permutation object, here it is 30
  97  gsl_permutation_swap($permutation->raw, 2,7);
  98  # the raw method is made to use the underlying permutation structure of the permutation object
  99  my $value = $permutation->get(2); # returns the third value (starting from 0) of the permutation
 100  my @values = $permutation->as_list; # returns all the values of the permutation
 101  my @set = $permutation->get([0,1,2,3]); # returns the four first values of the permutation
 102
 103 =head1 DESCRIPTION
 104
 105 Here is a list of all the functions included in this module :
 106
 107 =over
 108
 109 =item gsl_permutation_alloc($n) - return a newly allocated permutation of size $n
 110
 111 =item gsl_permutation_calloc($n) - return a newly allocated permutation of size $n which is initialized to the identity
 112
 113 =item gsl_permutation_init($p) - initialize the permutation $p to the identity i.e. (0,1,2, ..., n-1)
 114
 115 =item gsl_permutation_free($p) - free all the memory use by the permutaion $p
 116
 117 =item gsl_permutation_memcpy($dest, $src) - copy the permutation $src into the permutation $dest, the two permutations must have the same lenght and return 0 if the operation suceeded, 1 otherwise
 118
 119 =item gsl_permutation_fread($stream, $p) -  This function reads into the permutation $p from the open stream $stream (opened with the gsl_fopen function from the Math::GSL module) in binary format. The permutation $p must be preallocated with the correct length since the function uses the size of $p to determine how many bytes to read. The function returns 1 if there was a problem reading from the file. The data is assumed to have been written in the native binary format on the same architecture.
 120
 121 =item gsl_permutation_fwrite($stream, $p) - This function writes the elements of the permutation $p to the stream $stream (opened with the gsl_fopen function from the Math::GSL module) in binary format. The function returns 1 if there was a problem writing to the file. Since the data is written in the native binary format it may not be portable between different architectures.
 122
 123 =item gsl_permutation_fscanf($stream, $p) - This function reads formatted data from the stream $stream (opened with the gsl_fopen function from the Math::GSL module) into the permutation $p. The permutation $p must be preallocated with the correct length since the function uses the size of $p to determine how many numbers to read. The function returns 1 if there was a problem reading from the file.
 124
 125 =item gsl_permutation_fprintf($stream, $p, $format) - This function writes the elements of the permutation $p line-by-line to the stream $stream (opened with the gsl_fopen function from the Math::GSL module) using the format specifier $format, which should be suitable. "%zu\n" is a suitable format. The function returns 1 if there was a problem writing to the file.
 126
 127 =item gsl_permutation_size($p) - return the size of the permutation $p
 128
 129 =item gsl_permutation_data
 130
 131 =item gsl_permutation_get($p, $i) - return the $i-th element of the permutation $p, return 0 if $i is outside the range of 0 to n-1
 132
 133 =item gsl_permutation_swap($p, $i, $j) - exchange the $i-th position and the $j-th position of the permutation $p and return 0 if the operation suceeded, 1 otherwise
 134
 135 =item gsl_permutation_valid($p) - return 0 if the permutation $p is valid (if the n elements contain each of the numbers 0 to n-1 once and only once), 1 otherwise
 136
 137 =item gsl_permutation_reverse($p) - reverse the elements of the permutation $p
 138
 139 =item gsl_permutation_inverse($inv, $p) - compute the inverse of the permutation $p, storing it in $inv and return 0 if the operation succeeded, 1 otherwise
 140
 141 =item gsl_permutation_next($p) - advance the permutation $p to the next permutation in lexicographic order and return 0 if the operation succeeded, 1 otherwise
 142
 143 =item gsl_permutation_prev($p) - step backward from the permutation $p to the previous permutation in lexicographic order and return 0 if the operation suceeded, 1 otherwise
 144
 145 =item gsl_permutation_mul($p, $pa, $pb) - combine the two permutation $pa and $pb into a single permutation $p and return 0 if the operation suceeded, 1 otherwise
 146
 147 =item gsl_permutation_linear_to_canonical($q, $p) - compute the canonical form the permutation $p and store it in $q and return 0 if the operation suceeded, 1 otherwise
 148
 149 =item gsl_permutation_canonical_to_linear($p, $q) - convert a canonical permutation $q back into linear form and store it in $p and return 0 if the operation suceeded, 1 otherwise
 150
 151 =item gsl_permutation_inversions($p) - return the number of inversions in the permutation $p
 152
 153 =item gsl_permutation_linear_cycles($p) - return the number of cycles in the permutation $p, given a linear form
 154
 155 =item gsl_permute_vector_int_inversegsl_permutation_canonical_cycles($p) - return the number of cycles in the permutation $p, given a canonical form
 156
 157 =item gsl_permute
 158
 159 =item gsl_permute_inverse
 160
 161 =item gsl_permute_int
 162
 163 =item gsl_permute_int_inverse
 164
 165 =item gsl_permute_vector
 166
 167 =item gsl_permute_vector_inverse
 168
 169 =item gsl_permute_vector_int
 170
 171 =back
 172
 173  You have to add the functions you want to use inside the qw/put_funtion_here/ with spaces between each function.
 174  You can also write use Math::GSL::CDF qw/:all/ to use all avaible functions of the module.
 175  Other tags are also avaible, here is a complete list of all tags for this module.
 176 For more informations on the functions, we refer you to the GSL offcial documentation:
 177 L<http://www.gnu.org/software/gsl/manual/html_node/>
 178
 179  Tip : search on google: site:http://www.gnu.org/software/gsl/manual/html_node/ name_of_the_function_you_want
 180
 181 =head1 EXAMPLES
 182
 183  use Math::GSL::Permutation qw/:all/;
 184  $p->{permutation} = gsl_permutation_calloc(5);
 185  print "The permutation contains [";
 186  map { print gsl_permutation_get($p->{permutation}, $_) . ", " } (0..3);
 187  print gsl_permutation_get($p->{permutation}, 4);
 188  print "] \n";
 189  print "We'll then swap the first and last elements of the permutation...\n";
 190  gsl_permutation_swap($p->{permutation}, 0, 4);
 191  print "The permutation now contains [";
 192  map { print gsl_permutation_get($p->{permutation},$_) . ", " } (0..3);
 193  print gsl_permutation_get($p->{permutation}, 4);
 194  print "] \n";
 195
 196
 197  use Math::GSL::Permutation qw/:all/;
 198  use Math::GSL::Vector qw/:all/;
 199  my $p->{permutation} = gsl_permutation_calloc(6);
 200  gsl_permutation_init($p->{permutation});
 201  gsl_permutation_swap($p->{permutation}, 0, 1);
 202  print "The permutation has his first and second elements swapped : [";
 203  map { print gsl_permutation_get($p->{permutation}, $_) . "," } (0..4);
 204  print gsl_permutation_get($p->{permutation}, 5) . "] \n";
 205  my $vec->{vector} = gsl_vector_alloc(6);
 206  map { gsl_vector_set($vec->{vector}, $_, $_) } (0..5);
 207
 208  print "We will now apply the permutation to this vector : [";
 209  map { print gsl_vector_get($vec->{vector}, $_) . "," } (0..4);
 210  print gsl_vector_get($vec->{vector}, 5) . "] \n";
 211  gsl_permute_vector($p->{permutation}, $vec->{vector});
 212  print "The vector is now : [";
 213  map { print gsl_vector_get($vec->{vector}, $_) . "," } (0..4);
 214  print gsl_vector_get($vec->{vector}, 5) . "] \n";
 215
 216
 217 =head1 AUTHORS
 218
 219 Jonathan Leto <jonathan@leto.net> and Thierry Moisan <thierry.moisan@gmail.com>
 220
 221 =head1 COPYRIGHT AND LICENSE
 222
 223 Copyright (C) 2008 Jonathan Leto and Thierry Moisan
 224
 225 This program is free software; you can redistribute it and/or modify it
 226 under the same terms as Perl itself.
 227
 228 =cut
 229 %}
 230