NAME

  Algorithm::Evolutionary::Op::Mutation - BitFlip mutation, changes several bits in a bitstring, depending on the probability

SYNOPSIS

  use Algorithm::Evolutionary::Op::Mutation;

  my $xmlStr=<<EOC;
  <op name='Mutation' type='unary' rate='2'>
    <param name='probability' value='0.5' />
  </op>
  EOC
  my $ref = XMLin($xmlStr);

  my $op = Algorithm::Evolutionary::Op::->fromXML( $ref );
  print $op->asXML(), "\n*Arity ->", $op->arity(), "\n";

  my $op = new Algorithm::Evolutionary::Op::Mutation (0.5 ); #Create from scratch

Base Class

Algorithm::Evolutionary::Op::Base

DESCRIPTION

Mutation operator for a GA

METHODS

new

Creates a new mutation operator with a bitflip application rate, which defaults to 0.5, and an operator application rate (general for all ops), which defaults to 1.

create

Creates a new mutation operator with an application rate. Rate defaults to 0.5.

Called create to distinguish from the classwide ctor, new. It just makes simpler to create a Mutation Operator

apply

Applies mutation operator to a "Chromosome", a bitstring, really. Can be applied only to victims with the _str instance variable; it checks before application that the operand is of type Algorithm::Evolutionary::Individual::BitString. It returns the victim.

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: 2002/06/18 12:21:13 $ 
  $Header: /cvsroot/opeal/opeal/Algorithm/Evolutionary/Op/Mutation.pm,v 1.3 2002/06/18 12:21:13 jmerelo Exp $ 
  $Author: jmerelo $ 
  $Revision: 1.3 $
  $Name $