NAME

    Algorithm::Evolutionary::Op::NoChangeTerm - Checks for termination of an algorithm; terminates
                   when several generations transcur without change


SYNOPSIS

    my $nct = new Algorithm::Evolutionary::Op::NoChangeTerm 10; 
    #nct->apply( \@pop ) will return false after 10 generations w/o change


Base Class

Algorithm::Evolutionary::Op::Base


DESCRIPTION

Algorithm::Evolutionary::Op::NoChangeTerm is used when we want an algorithm to finish when the population has stagnated, or the global optimum is found. It counts how many generations the population has not changed, and returns false after that limit is reached.

It is useful if you want to run an algorithm for a certain time, or if you want to apply some fancy diversity operator


METHODS

new

Creates a new terminator. Takes as an argument the number of generations after which it will return false, which defaults to 10.

apply

Checks if the first member of the population has the same fitness as before, and increments counter. The population should be ordered


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: 2002/07/25 09:09:02 $ 
  $Header: /cvsroot/opeal/opeal/Algorithm/Evolutionary/Op/NoChangeTerm.pm,v 1.3 2002/07/25 09:09:02 jmerelo Exp $ 
  $Author: jmerelo $ 
  $Revision: 1.3 $
  $Name $

=cut

``The truth is out there'';