J. J. Merelo-Guervós > POE-Component-Algorithm-Evolutionary > POE::Component::Algorithm::Evolutionary

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Module Version: 0.2.1   Source  

NAME ^

POE::Component::Algorithm::Evolutionary - Run evolutionary algorithms in a preemptive multitasking way.

VERSION ^

This document describes POE::Component::Algorithm::Evolutionary version 0.0.3

SYNOPSIS ^

  use POE::Component::Algorithm::Evolutionary;

  use Algorithm::Evolutionary qw( Individual::BitString Op::Creator 
                                  Op::CanonicalGA Op::Bitflip 
                                  Op::Crossover Op::GenerationalTerm
                                  Fitness::Royal_Road);

  my $bits = shift || 64;
  my $block_size = shift || 4;
  my $pop_size = shift || 256; #Population size
  my $numGens = shift || 200; #Max number of generations
  my $selection_rate = shift || 0.2;

  #Initial population
  my $creator = new Algorithm::Evolutionary::Op::Creator( $pop_size, 'BitString', { length => $bits });

  # Variation operators
  my $m = Algorithm::Evolutionary::Op::Bitflip->new( 1 );
  my $c = Algorithm::Evolutionary::Op::Crossover->new(2, 4);

  # Fitness function: create it and evaluate
  my $rr = new  Algorithm::Evolutionary::Fitness::Royal_Road( $block_size );

  my $generation = Algorithm::Evolutionary::Op::CanonicalGA->new( $rr , $selection_rate , [$m, $c] ) ;
  my $gterm = new Algorithm::Evolutionary::Op::GenerationalTerm 10;

  POE::Component::Algorithm::Evolutionary->new( Fitness => $rr,
                                                Creator => $creator,
                                                Single_Step => $generation,
                                                Terminator => $gterm,
                                                Alias => 'Canonical' );


  $poe_kernel->run();

DESCRIPTION ^

Not a lot here: it creates a component that uses POE to run an evolutionary algorithm

INTERFACE ^

AUTOLOAD

Automatically defines accesors for instance variables. For instance, $session->Fitness() would return the fitness object, of $self->Population() return the population hashref.

new

POE::Component::Algorithm::Evolutionary->new( Fitness => $rr, Creator => $creator, Single_Step => $generation, Terminator => $gterm, Alias => 'Canonical', After_Step => $after_step_code);

It's called with all components needed to run an evolutionary algorithm; to keep everything flexible they are created in advance. See the scripts/ directory for an example.

new_population

Called with a hashref to the new population to incorporate

start

Called internally for initializing population

generation

This is run once for each generation, until end condition is met

after_step

Run always after each generation, with hooks so that you can add your own code. The first argument for the subroutine will be a population hash, and the second the argument that the event receives.

finishing

Called when everything is over. Prints winner

CONFIGURATION AND ENVIRONMENT ^

POE::Component::Algorithm::Evolutionary requires no configuration files or environment variables.

DEPENDENCIES ^

Main dependence is Algorithm::Evolutionary; however, it's not included by default, since you must pick and choose the modules you are going to actually use.

INCOMPATIBILITIES ^

None reported.

BUGS AND LIMITATIONS ^

No bugs have been reported.

Please report any bugs or feature requests to bug-poe-component-algorithm-evolutionary@rt.cpan.org, or through the web interface at http://rt.cpan.org.

AUTHOR ^

JJ Merelo <jj@merelo.net>

Boilerplate taken from article in perl.com

LICENCE AND COPYRIGHT ^

Copyright (c) 2009, JJ Merelo <jj@merelo.net>. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.

  CVS Info: $Date: 2009/02/13 09:22:57 $ 
  $Header: /cvsroot/opeal/POE-Component-Algorithm-Evolutionary/lib/POE/Component/Algorithm/Evolutionary.pm,v 1.9 2009/02/13 09:22:57 jmerelo Exp $ 
  $Author: jmerelo $ 
  $Revision: 1.9 $ ' 

DISCLAIMER OF WARRANTY ^

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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