ec.multiobjective.spea2
Class SPEA2Subpopulation

java.lang.Object
  |
  +--ec.Subpopulation
        |
        +--ec.multiobjective.spea2.SPEA2Subpopulation

All Implemented Interfaces:

java.lang.Cloneable, Group, java.io.Serializable, Setup

public class SPEA2Subpopulation

extends Subpopulation

implements Group

SPEA2Subpopulation is a simple subclass of Subpopulation which adds the archiveSize field. The archive is portion of the subpopulation so archive size may not exceed the population size.

Parameters

base.archive-size int >= 1 < populationSize

(total number of individuals from the population which are in the archive)

Parameter bases

base.species	species (the subpopulations' species)
base.fitness	f_prototype (the prototypical fitness)

See Also:

Subpopulation, Serialized Form

Field Summary

int	archiveSize The SPEA2 archive size
static java.lang.String	P_ARCHIVESIZE

Fields inherited from class ec.Subpopulation

f_prototype, individuals, loadInds, numDuplicateRetries, P_FILE, P_FITNESS, P_RETRIES, P_SPECIES, P_SUBPOPSIZE, species

Constructor Summary

SPEA2Subpopulation()

Method Summary

void	setup(EvolutionState state, Parameter base) Returns an instance of Subpopulation just like it had been before it was populated with individuals.

Methods inherited from class ec.Subpopulation

emptyClone, populate

Methods inherited from class java.lang.Object

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

Methods inherited from interface ec.Group

emptyClone

Field Detail

archiveSize

public int archiveSize

The SPEA2 archive size

P_ARCHIVESIZE

public static final java.lang.String P_ARCHIVESIZE

Constructor Detail

SPEA2Subpopulation

public SPEA2Subpopulation()

Method Detail

setup

public void setup(EvolutionState state,
                  Parameter base)

Returns an instance of Subpopulation just like it had been before it was populated with individuals. You may need to override this if you override Subpopulation. IMPORTANT NOTE: if the size of the array in Subpopulation has been changed, then the clone will take on the new array size. This helps some evolution strategies.

Specified by:

setup in interface Setup

Overrides:

setup in class Subpopulation

See Also:

Group.emptyClone()