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lib/Algorithm/Evolutionary/Op/Crossover.pm  view on Meta::CPAN

use strict;
use warnings;

=head1 NAME

Algorithm::Evolutionary::Op::Crossover - n-point crossover
    operator; puts fragments of the second operand into the first operand
             

=head1 SYNOPSIS

  #Create from XML description using EvoSpec
  my $xmlStr3=<<EOC;
  <op name='Crossover' type='binary' rate='1'>
    <param name='numPoints' value='3' /> #Max is 2, anyways
  </op>
  EOC
  my $op3 = Algorithm::Evolutionary::Op::Base->fromXML( $xmlStr3 );
  print $op3->asXML(), "\n";

  #Apply to 2 Individuals of the String class
  my $indi = new Algorithm::Evolutionary::Individual::BitString 10;
  my $offspring = $op3->apply( $indi2, $indi3 ); #$indi2 == $offspring

  #Initialize using OO interface
  my $op4 = new Algorithm::Evolutionary::Op::Crossover 2; #Crossover with 2 crossover points

=head1 Base Class

L<Algorithm::Evolutionary::Op::Base|Algorithm::Evolutionary::Op::Base>

=head1 DESCRIPTION

Crossover operator for a Individuals of type
L<Algorithm::Evolutionary::Individual::String|Individual::String> and
their descendants
(L<Algorithm::Evolutionary::Individual::BitString|Individual::BitString>). Crossover
for L<Algorithm::Evolutionary::Individual::Vector|Individual::Vector>
would be  L<Algorithm::Evolutionary::Op::VectorCrossover|Op::VectorCrossover>

=head1 METHODS

=cut

package Algorithm::Evolutionary::Op::Crossover;

use lib qw(../../..);

our $VERSION =   sprintf "%d.%03d", q$Revision: 3.2 $ =~ /(\d+)\.(\d+)/g; # Hack for avoiding version mismatch

use Clone qw(clone);
use Carp;

use base 'Algorithm::Evolutionary::Op::Base';

#Class-wide constants
our $APPLIESTO =  'Algorithm::Evolutionary::Individual::String';
our $ARITY = 2;
our %parameters = ( numPoints => 2 );

=head2 new( [$options_hash] [, $operation_priority] )

Creates a new n-point crossover operator, with 2 as the default number
of points, that is, the default would be
    my $options_hash = { numPoints => 2 };
    my $priority = 1;