J. J. Merelo-Guervós > Algorithm-Evolutionary-0.78_2 > Algorithm::Evolutionary::Wheel

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Module Version: 3.6   Source   Latest Release: Algorithm-Evolutionary-0.79_2

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 $ 
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