org.oakgp.evolve.mutate

Class ShrinkMutation

java.lang.Object

org.oakgp.evolve.mutate.ShrinkMutation

All Implemented Interfaces:

GeneticOperator

public final class ShrinkMutation
extends Object
implements GeneticOperator

Replaces a randomly selected function node of the parent with a terminal node.

The resulting offspring will be smaller than the parent.

Constructor Summary

Constructors

Constructor and Description
ShrinkMutation(Random random, PrimitiveSet primitiveSet) Creates a ShrinkMutation that uses a Random to select function nodes to replace with terminals from a PrimitiveSet.

Method Summary

Modifier and Type	Method and Description
Node	evolve(NodeSelector selector) Returns a new Node evolved from existing instances.

Methods inherited from class java.lang.Object

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

Constructor Detail

ShrinkMutation

public ShrinkMutation(Random random,
                      PrimitiveSet primitiveSet)

Creates a ShrinkMutation that uses a Random to select function nodes to replace with terminals from a PrimitiveSet.

Parameters:

random - used to randomly select function nodes

primitiveSet - used to select terminal nodes to replace function nodes with

Method Detail

evolve

public Node evolve(NodeSelector selector)

Description copied from interface: GeneticOperator

Returns a new Node evolved from existing instances.

Specified by:

evolve in interface GeneticOperator

Parameters:

selector - used to select the existing instances to use as a basis for evolving a new instance

Returns:

a new Node evolved from existing instances obtained from selector