10 gsl_permutation_fscanf
11 gsl_permutation_fprintf
17 gsl_permutation_reverse
18 gsl_permutation_inverse
22 gsl_permutation_linear_to_canonical
23 gsl_permutation_canonical_to_linear
24 gsl_permutation_inversions
25 gsl_permutation_linear_cycles
26 gsl_permutation_canonical_cycles
30 gsl_permute_int_inverse
32 gsl_permute_vector_inverse
33 gsl_permute_vector_int
34 gsl_permute_vector_int_inverse
36 %EXPORT_TAGS = ( all => [ @EXPORT_OK ] );
38 ### wrapper interface ###
40 my ($class, $value) = @_;
42 $this->{_length} = $value;
43 $this->{_permutation} = gsl_permutation_calloc($value);
49 $self->get( [ 0 .. $self->length - 1 ] );
53 my ($self, $indices) = @_;
54 return map { gsl_permutation_get($self->{_permutation}, $_ ) } @$indices ;
57 sub raw { (shift)->{_permutation} }
58 sub length { (shift)->{_length} }
67 Math::GSL::Permutation - functions for creating and manipulating permutations
71 use Math::GSL::Permutation qw/:all/;
72 my $permutation = Math::GSL::Permutation->new(30); # allocate and initialize a permutation of size 30
73 my $lenght = $permutation->lenght; # returns the lenght of the permutation object, here it is 30
74 gsl_permutation_swap($permutation->raw, 2,7);
75 # the raw method is made to use the underlying permutation structure of the permutation object
76 my $value = $permutation->get(2); # returns the third value (starting from 0) of the permutation
77 my @values = $permutation->as_list; # returns all the values of the permutation
78 my @set = $permutation->get([0,1,2,3]); # returns the four first values of the permutation
82 Here is a list of all the functions included in this module :
86 =item gsl_permutation_alloc($n) - return a newly allocated permutation of size $n
88 =item gsl_permutation_calloc($n) - return a newly allocated permutation of size $n which is initialized to the identity
90 =item gsl_permutation_init($p) - initialize the permutation $p to the identity i.e. (0,1,2, ..., n-1)
92 =item gsl_permutation_free($p) - free all the memory use by the permutaion $p
94 =item gsl_permutation_memcpy($dest, $src) - copy the permutation $src into the permutation $dest, the two permutations must have the same lenght and return 0 if the operation suceeded, 1 otherwise
96 =item gsl_permutation_fread($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 $p to determine how many bytes to read. The function returns 1 if there was a problem reading from the file. The data is assumed to have been written in the native binary format on the same architecture.
98 =item gsl_permutation_fwrite($stream, $p) - This function writes the elements of the permutation $p to the stream $stream (opened with the gsl_fopen function from the Math::GSL module) in binary format. The function returns 1 if there was a problem writing to the file. Since the data is written in the native binary format it may not be portable between different architectures.
100 =item gsl_permutation_fscanf($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 $p to determine how many numbers to read. The function returns 1 if there was a problem reading from the file.
102 =item gsl_permutation_fprintf($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 $format, which should be suitable. "%zu\n" is a suitable format. The function returns 1 if there was a problem writing to the file.
104 =item gsl_permutation_size($p) - return the size of the permutation $p
106 =item gsl_permutation_data
108 =item gsl_permutation_get($p, $i) - return the $i-th element of the permutation $p, return 0 if $i is outside the range of 0 to n-1
110 =item gsl_permutation_swap($p, $i, $j) - exchange the $i-th position and the $j-th position of the permutation $p and return 0 if the operation suceeded, 1 otherwise
112 =item gsl_permutation_valid($p) - return 0 if the permutation $p is valid (if the n elements contain each of the numbers 0 to n-1 once and only once), 1 otherwise
114 =item gsl_permutation_reverse($p) - reverse the elements of the permutation $p
116 =item gsl_permutation_inverse($inv, $p) - compute the inverse of the permutation $p, storing it in $inv and return 0 if the operation succeeded, 1 otherwise
118 =item gsl_permutation_next($p) - advance the permutation $p to the next permutation in lexicographic order and return 0 if the operation succeeded, 1 otherwise
120 =item gsl_permutation_prev($p) - step backward from the permutation $p to the previous permutation in lexicographic order and return 0 if the operation suceeded, 1 otherwise
122 =item gsl_permutation_mul($p, $pa, $pb) - combine the two permutation $pa and $pb into a single permutation $p and return 0 if the operation suceeded, 1 otherwise
124 =item gsl_permutation_linear_to_canonical($q, $p) - compute the canonical form the permutation $p and store it in $q and return 0 if the operation suceeded, 1 otherwise
126 =item gsl_permutation_canonical_to_linear($p, $q) - convert a canonical permutation $q back into linear form and store it in $p and return 0 if the operation suceeded, 1 otherwise
128 =item gsl_permutation_inversions($p) - return the number of inversions in the permutation $p
130 =item gsl_permutation_linear_cycles($p) - return the number of cycles in the permutation $p, given a linear form
132 =item gsl_permute_vector_int_inversegsl_permutation_canonical_cycles($p) - return the number of cycles in the permutation $p, given a canonical form
136 =item gsl_permute_inverse
138 =item gsl_permute_int
140 =item gsl_permute_int_inverse
142 =item gsl_permute_vector
144 =item gsl_permute_vector_inverse
146 =item gsl_permute_vector_int
150 You have to add the functions you want to use inside the qw/put_funtion_here/ with spaces between each function.
151 You can also write use Math::GSL::CDF qw/:all/ to use all avaible functions of the module.
152 Other tags are also avaible, here is a complete list of all tags for this module.
153 For more informations on the functions, we refer you to the GSL offcial documentation:
154 L<http://www.gnu.org/software/gsl/manual/html_node/>
156 Tip : search on google: site:http://www.gnu.org/software/gsl/manual/html_node/ name_of_the_function_you_want
160 use Math::GSL::Permutation qw/:all/;
161 $p->{permutation} = gsl_permutation_calloc(5);
162 print "The permutation contains [";
163 map { print gsl_permutation_get($p->{permutation}, $_) . ", " } (0..3);
164 print gsl_permutation_get($p->{permutation}, 4);
166 print "We'll then swap the first and last elements of the permutation...\n";
167 gsl_permutation_swap($p->{permutation}, 0, 4);
168 print "The permutation now contains [";
169 map { print gsl_permutation_get($p->{permutation},$_) . ", " } (0..3);
170 print gsl_permutation_get($p->{permutation}, 4);
174 use Math::GSL::Permutation qw/:all/;
175 use Math::GSL::Vector qw/:all/;
176 my $p->{permutation} = gsl_permutation_calloc(6);
177 gsl_permutation_init($p->{permutation});
178 gsl_permutation_swap($p->{permutation}, 0, 1);
179 print "The permutation has his first and second elements swapped : [";
180 map { print gsl_permutation_get($p->{permutation}, $_) . "," } (0..4);
181 print gsl_permutation_get($p->{permutation}, 5) . "] \n";
182 my $vec->{vector} = gsl_vector_alloc(6);
183 map { gsl_vector_set($vec->{vector}, $_, $_) } (0..5);
185 print "We will now apply the permutation to this vector : [";
186 map { print gsl_vector_get($vec->{vector}, $_) . "," } (0..4);
187 print gsl_vector_get($vec->{vector}, 5) . "] \n";
188 gsl_permute_vector($p->{permutation}, $vec->{vector});
189 print "The vector is now : [";
190 map { print gsl_vector_get($vec->{vector}, $_) . "," } (0..4);
191 print gsl_vector_get($vec->{vector}, 5) . "] \n";
196 Jonathan Leto <jonathan@leto.net> and Thierry Moisan <thierry.moisan@gmail.com>
198 =head1 COPYRIGHT AND LICENSE
200 Copyright (C) 2008-2009 Jonathan Leto and Thierry Moisan
202 This program is free software; you can redistribute it and/or modify it
203 under the same terms as Perl itself.