ec.multiobjective.spea2

Class SPEA2Breeder

java.lang.Object

ec.Breeder

ec.simple.SimpleBreeder

ec.multiobjective.spea2.SPEA2Breeder

All Implemented Interfaces:

Setup, Singleton, java.io.Serializable

public class SPEA2Breeder
extends SimpleBreeder

This subclass of SimpleBreeder overrides the loadElites method to build an archive in the top elites[subpopnum] of each subpopulation. It computes the sparsity metric, then constructs the archive.

See Also:

Serialized Form

Field Summary

Fields inherited from class ec.simple.SimpleBreeder

backupPopulation, clonePipelineAndPopulation, elite, eliteFrac, minimumSize, newIndividuals, NOT_SET, P_CLONE_PIPELINE_AND_POPULATION, P_ELITE, P_ELITE_FRAC, P_MINIMUM_SIZE, P_REDUCE_BY, P_REEVALUATE_ELITES, P_SEQUENTIAL_BREEDING, pool, reduceBy, reevaluateElites, sequentialBreeding

Constructor Summary

Constructors

Constructor and Description
SPEA2Breeder()

Method Summary

Modifier and Type	Method and Description
void	buildArchive(EvolutionState state, java.util.ArrayList<Individual> oldInds, java.util.ArrayList<Individual> newInds, int archiveSize)
double[]	calculateDistancesFromIndividual(Individual ind, java.util.ArrayList<Individual> inds)
protected void	loadElites(EvolutionState state, Population newpop) A private helper function for breedPopulation which loads elites into a subpopulation.
void	setup(EvolutionState state, Parameter base) Sets up the object by reading it from the parameters stored in state, built off of the parameter base base.

Methods inherited from class ec.simple.SimpleBreeder

breedPopChunk, breedPopulation, computeSubpopulationLength, numElites, shouldBreedSubpop, unmarkElitesEvaluated, usingElitism

Methods inherited from class java.lang.Object

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

Constructor Detail

SPEA2Breeder

public SPEA2Breeder()

Method Detail

setup

public void setup(EvolutionState state,
                  Parameter base)

Description copied from interface: Setup

Sets up the object by reading it from the parameters stored in state, built off of the parameter base base. If an ancestor implements this method, be sure to call super.setup(state,base); before you do anything else.

Specified by:

setup in interface Setup

Overrides:

setup in class SimpleBreeder

loadElites

protected void loadElites(EvolutionState state,
                          Population newpop)

Description copied from class: SimpleBreeder

A private helper function for breedPopulation which loads elites into a subpopulation.

Overrides:

loadElites in class SimpleBreeder

calculateDistancesFromIndividual

public double[] calculateDistancesFromIndividual(Individual ind,
                                                 java.util.ArrayList<Individual> inds)

buildArchive

public void buildArchive(EvolutionState state,
                         java.util.ArrayList<Individual> oldInds,
                         java.util.ArrayList<Individual> newInds,
                         int archiveSize)