NAME

Algorithm::Evolutionary::Wheel - Random selector of things depending on probabilities

SYNOPSIS

    my $wheel = new Algorithm::Evolutionary::Wheel( @probs );
    print $wheel->spin(); #Returns an element according to probabilities;

DESCRIPTION

Creates a "roulette wheel" for spinning and selecting stuff. It will be used in several places; mainly in the Algorithm::Evolutionary::Op::CanonicalGA. Take care that fitness must be non-zero positives; since if they aren't, roulette wheel won't work at all

METHODS

new( @probabilites )

Creates a new roulette wheel. Takes an array of numbers, which need not be normalized

spin( [$number_of_individuals = 1])

Returns an individual whose probability is related to its fitness

first( $item, $ref_to_list )

Returns the index of the first individual smaller than the item

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: 2010/12/08 09:31:24 $ 
  $Header: /cvsroot/opeal/Algorithm-Evolutionary/lib/Algorithm/Evolutionary/Wheel.pm,v 3.6 2010/12/08 09:31:24 jmerelo Exp $ 
  $Author: jmerelo $

CPAN RT