ec.cgp
Class ESSelectionCGP

java.lang.Object
  ec.BreedingSource
      ec.SelectionMethod
          ec.es.ESSelection
              ec.cgp.ESSelectionCGP

All Implemented Interfaces:

ec.Prototype, ec.Setup, ec.util.RandomChoiceChooser, java.io.Serializable, java.lang.Cloneable

public class ESSelectionCGP
extends ec.es.ESSelection

CGP benefits greatly from 'neutrality', the idea that genetic drift yields to diverse individuals having equal fitness. This hacked ESSelection ensures equally-fit individuals are uniformly considered during ES selection.

Author:

David Oranchak, doranchak@gmail.com, http://oranchak.com

See Also:

Serialized Form

Field Summary

Fields inherited from class ec.es.ESSelection

P_ESSELECT

Fields inherited from class ec.SelectionMethod

INDS_PRODUCED

Fields inherited from class ec.BreedingSource

CHECKBOUNDARY, DEFAULT_PRODUCED, NO_PROBABILITY, P_PROB, probability, UNUSED

Constructor Summary

ESSelectionCGP()

Method Summary

int

produce(int min, int max, int start, int subpopulation, ec.Individual[] inds, ec.EvolutionState state, int thread) Produces n individuals from the given subpopulation and puts them into inds[start...start+n-1], where n = Min(Max(q,min),max), where q is the "typical" number of individuals the BreedingSource produces in one shot, and returns n.

Methods inherited from class ec.es.ESSelection

defaultBase, prepareToProduce, produce

Methods inherited from class ec.SelectionMethod

finishProducing, preparePipeline, produces, typicalIndsProduced

Methods inherited from class ec.BreedingSource

clone, getProbability, pickRandom, setProbability, setup, setupProbabilities

Methods inherited from class java.lang.Object

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

Constructor Detail

ESSelectionCGP

public ESSelectionCGP()

Method Detail

produce

public int produce(int min,
                   int max,
                   int start,
                   int subpopulation,
                   ec.Individual[] inds,
                   ec.EvolutionState state,
                   int thread)

Description copied from class: ec.BreedingSource

Produces n individuals from the given subpopulation and puts them into inds[start...start+n-1], where n = Min(Max(q,min),max), where q is the "typical" number of individuals the BreedingSource produces in one shot, and returns n. max must be >= min, and min must be >= 1. For example, crossover might typically produce two individuals, tournament selection might typically produce a single individual, etc.

Overrides:

produce in class ec.es.ESSelection