ec.multiobjective.spea2
Class SPEA2TournamentSelection

java.lang.Object
  ec.BreedingSource
      ec.SelectionMethod
          ec.select.TournamentSelection
              ec.multiobjective.spea2.SPEA2TournamentSelection

All Implemented Interfaces:

Prototype, Setup, SteadyStateBSourceForm, RandomChoiceChooser, java.io.Serializable, java.lang.Cloneable

public class SPEA2TournamentSelection
extends TournamentSelection

This is a special version of TournamentSelection which restricts the selection to only the archive region (the top 'archiveSize' elements in the subpopulation).

See Also:

Serialized Form

Field Summary

Fields inherited from class ec.select.TournamentSelection

DEFAULT_SIZE, P_PICKWORST, P_SIZE, P_TOURNAMENT, pickWorst, probabilityOfPickingSizePlusOne

Fields inherited from class ec.SelectionMethod

INDS_PRODUCED

Fields inherited from class ec.BreedingSource

NO_PROBABILITY, P_PROB, probability

Constructor Summary

SPEA2TournamentSelection()

Method Summary

int	getRandomIndividual(int number, int subpopulation, EvolutionState state, int thread) Produces the index of a (typically uniformly distributed) randomly chosen individual to fill the tournament.

Methods inherited from class ec.select.TournamentSelection

betterThan, defaultBase, getTournamentSizeToUse, individualReplaced, produce, setup, sourcesAreProperForm

Methods inherited from class ec.SelectionMethod

finishProducing, prepareToProduce, produce, produces, typicalIndsProduced

Methods inherited from class ec.BreedingSource

clone, getProbability, pickRandom, preparePipeline, setProbability, setupProbabilities

Methods inherited from class java.lang.Object

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

Constructor Detail

SPEA2TournamentSelection

public SPEA2TournamentSelection()

Method Detail

getRandomIndividual

public int getRandomIndividual(int number,
                               int subpopulation,
                               EvolutionState state,
                               int thread)

Description copied from class: TournamentSelection

Produces the index of a (typically uniformly distributed) randomly chosen individual to fill the tournament. number is the position of the individual in the tournament.

Overrides:

getRandomIndividual in class TournamentSelection