Module io.jenetics.ext

Package io.jenetics.ext

Class HPRMutator<G extends Gene<?,G>,C extends Comparable<? super C>>

java.lang.Object

io.jenetics.AbstractAlterer<G,C>

io.jenetics.Mutator<G,C>

io.jenetics.ext.HPRMutator<G,C>

All Implemented Interfaces:

Alterer<G,C>

public class HPRMutator<G extends Gene<?,G>,C extends Comparable<? super C>>
extends Mutator<G,C>

The Hybridizing PSM and RSM Operator (HPRM) constructs an offspring from a pair of parents by hybridizing two mutation operators, PSM and RSM.

This mutator is described in A New Mutation Operator for Solving an NP-Complete Problem: Travelling Salesman Problem, by Otman Abdoun, Chakir Tajani and Jaafar Abouchabka.

Since:

5.0

Version:

5.0

See Also:

• RSMutator
• SwapMutator

Field Summary

Fields inherited from class io.jenetics.AbstractAlterer

_probability

Fields inherited from interface io.jenetics.Alterer

DEFAULT_ALTER_PROBABILITY

Constructor Summary

Constructors

Constructor	Description
HPRMutator()	Default constructor, with default mutation probability (Alterer.DEFAULT_ALTER_PROBABILITY).
HPRMutator(double probability)	Constructs an alterer with a given recombination probability.

Method Summary

Modifier and Type	Method	Description
protected MutatorResult<Chromosome<G>>	mutate(Chromosome<G> chromosome, double p, RandomGenerator random)	Mutates the given chromosome.

Methods inherited from class io.jenetics.Mutator

alter, mutate, mutate, mutate, toString

Methods inherited from class io.jenetics.AbstractAlterer

probability

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.jenetics.Alterer

andThen, compose

Constructor Details

HPRMutator

public HPRMutator(double probability)

Constructs an alterer with a given recombination probability.

Parameters:

probability - the crossover probability.

Throws:

IllegalArgumentException - if the probability is not in the valid range of [0, 1].

HPRMutator

public HPRMutator()

Default constructor, with default mutation probability (Alterer.DEFAULT_ALTER_PROBABILITY).

Method Details

mutate

protected MutatorResult<Chromosome<G>> mutate(Chromosome<G> chromosome,
 double p,
 RandomGenerator random)

Description copied from class: Mutator

Mutates the given chromosome.

Overrides:

mutate in class Mutator<G extends Gene<?,G>,C extends Comparable<? super C>>

Parameters:

chromosome - the chromosome to mutate

p - the mutation probability for the underlying genetic objects

random - the random engine used for the genotype mutation

Returns:

the mutation result

See Also:

• Mutator.mutate(Gene, RandomGenerator)