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Algorithm::EvolutionarUserpContributedlPerithm::Evolutionary::Op::DeltaTerm(3)

NAME
	   Algorithm::Evolutionary::Op::DeltaTerm - Termination	condition for an algorithm; checks that
		       the difference of the best to a target is less than a delta

SYNOPSIS
	  my $target = 1;
	  my $epsilon =	0.01;
	  my $dt = new Algorithm::Evolutionary::Op::DeltaTerm $target, $epsilon;
	  #$dt->apply( \@pop ) when the	best fitness is	1 plus/minus 0.1

Base Class
       Algorithm::Evolutionary::Op::Base

DESCRIPTION
       Termination condition for evolutionary algorithm	loops; the "apply"
       method returns false when the first element in the array	is as close to
       the target as the differente indicated.

METHODS
   new(	$target[, $delta] )
       Creates a new terminator. Takes as parameters the target	and the
       epsilon (or delta, whatever you want to call it):

	 my $target = 1;
	 my $epsilon = 0.01;
	 my $dt	= new Algorithm::Evolutionary::Op::DeltaTerm $target, $epsilon;

       Delta can be 0, which means that	application of this operator will
       return true only	when the first element fitness is the same as the
       target. Use this	judiciously when your fitness is a floating point
       number.

   apply( $population )
       Will return true	while the difference between the fitness of the	first
       element in the population and the target	is less	than $delta, true
       otherwise

	   $dt->apply( \@pop ) == 1

       if the target has not been reached. Population must be sorted before
       this.

See Also
       Algorithm::Evolutionary::Op::FullAlgorithm needs	an object of this
       class to	check for the termination condition. It's normally used
       alongside "generation-type" objects such	as
       Algorithm::Evolutionary::Op::Easy.

       There are other options for termination conditions:
       Algorithm::Evolutionary::Op::NoChangeTerm and
       Algorithm::Evolutionary::Op::GenerationalTerm.

Copyright
	 This file is released under the GPL. See the LICENSE file included in this distribution,
	 or go to http://www.fsf.org/licenses/gpl.txt

	 CVS Info: $Date: 2009/07/24 08:46:59 $
	 $Header: /media/Backup/Repos/opeal/opeal/Algorithm-Evolutionary/lib/Algorithm/Evolutionary/Op/DeltaTerm.pm,v 3.0 2009/07/24 08:46:59 jmerelo Exp $
	 $Author: jmerelo $

perl v5.32.1			  201Algorithm::Evolutionary::Op::DeltaTerm(3)

NAME | SYNOPSIS | Base Class | DESCRIPTION | METHODS | See Also | Copyright

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