io.jenetics.ext

Class WeaselMutator<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.WeaselMutator<G,C>

All Implemented Interfaces:

Alterer<G,C>

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

Mutator implementation which is part of the Weasel program algorithm. The Weasel program is an thought experiment by Richard Dawkins to illustrate the functioning of the evolution: random mutation combined with non-random cumulative selection.

The mutator mutates the genes of every chromosome of every genotype in the population with the given mutation probability.

Engine setup for the Weasel program:

final Engine<CharacterGene, Integer> engine = Engine .builder(fitness, gtf) // Set the 'WeaselSelector'. .selector(new WeaselSelector<>()) // Disable survivors selector. .offspringFraction(1) // Set the 'WeaselMutator'. .alterers(new WeaselMutator<>(0.05)) .build();

Since:

3.5

Version:

3.5

Author:

Franz Wilhelmstötter

See Also:

Weasel program, WeaselSelector

Field Summary

Fields inherited from class io.jenetics.AbstractAlterer

_probability

Fields inherited from interface io.jenetics.Alterer

DEFAULT_ALTER_PROBABILITY

Constructor Summary

Constructors

Constructor and Description
WeaselMutator()
WeaselMutator(double probability)

Method Summary

Modifier and Type	Method and Description
AltererResult<G,C>	alter(Seq<Phenotype<G,C>> population, long generation)
boolean	equals(Object obj)
int	hashCode()
protected MutatorResult<Genotype<G>>	mutate(Genotype<G> genotype, double p, Random random)
String	toString()

Methods inherited from class io.jenetics.Mutator

mutate, mutate, mutate

Methods inherited from class io.jenetics.AbstractAlterer

getProbability

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.jenetics.Alterer

andThen, compose, of

Constructor Detail

WeaselMutator

public WeaselMutator(double probability)

WeaselMutator

public WeaselMutator()

Method Detail

alter

public AltererResult<G,C> alter(Seq<Phenotype<G,C>> population,
                                long generation)

Specified by:

alter in interface Alterer<G extends Gene<?,G>,C extends Comparable<? super C>>

Overrides:

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

mutate

protected MutatorResult<Genotype<G>> mutate(Genotype<G> genotype,
                                            double p,
                                            Random random)

Overrides:

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

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractAlterer<G extends Gene<?,G>,C extends Comparable<? super C>>

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractAlterer<G extends Gene<?,G>,C extends Comparable<? super C>>

toString

public String toString()

Overrides:

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