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: 2002/09/01 15:34:19 $ 
$Header: /cvsroot/opeal/opeal/Algorithm/Evolutionary/Op/Permutation.pm,v 1.1 2002/09/01 15:34:19 jmerelo Exp $ 
$Author: jmerelo $ 
$Revision: 1.1 $
$Name $