ec.multiobjective.spea2
Class SPEA2Subpopulation

java.lang.Object
  ec.Subpopulation
      ec.multiobjective.spea2.SPEA2Subpopulation

All Implemented Interfaces:

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

public class SPEA2Subpopulation
extends Subpopulation

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	species.f_prototype (the prototypical fitness)

See Also:

Subpopulation, Serialized Form

Field Summary

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

Fields inherited from class ec.Subpopulation

INDIVIDUAL_INDEX_PREAMBLE, individuals, loadInds, NUM_INDIVIDUALS_PREAMBLE, numDuplicateRetries, P_FILE, P_RETRIES, P_SPECIES, P_SUBPOPSIZE, species

Constructor Summary

SPEA2Subpopulation()

Method Summary

void	printSubpopulation(EvolutionState state, int log, int verbosity) Overridden to include the archive size in the stream.
void	printSubpopulation(EvolutionState state, java.io.PrintWriter writer) Overridden to include the archive size in the stream.
void	printSubpopulationForHumans(EvolutionState state, int log, int verbosity) Overridden to include the archive size in the stream.
void	readSubpopulation(EvolutionState state, java.io.DataInput dataInput) Overridden to include the archive size in the stream.
void	readSubpopulation(EvolutionState state, java.io.LineNumberReader reader) Overridden to include the archive size in the stream.
void	setup(EvolutionState state, Parameter base) Returns an instance of Subpopulation just like it had been before it was populated with individuals.
void	writeSubpopulation(EvolutionState state, java.io.DataOutput dataOutput) Overridden to include the archive size in the stream.

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

Field Detail

archiveSize

public int archiveSize

The SPEA2 archive size

P_ARCHIVESIZE

public static final java.lang.String P_ARCHIVESIZE

See Also:

Constant Field Values

ARCHIVE_PREAMBLE

public static final java.lang.String ARCHIVE_PREAMBLE

See Also:

Constant Field Values

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()

printSubpopulationForHumans

public void printSubpopulationForHumans(EvolutionState state,
                                        int log,
                                        int verbosity)

Overridden to include the archive size in the stream.

Overrides:

printSubpopulationForHumans in class Subpopulation

printSubpopulation

public void printSubpopulation(EvolutionState state,
                               int log,
                               int verbosity)

Overridden to include the archive size in the stream.

Overrides:

printSubpopulation in class Subpopulation

printSubpopulation

public void printSubpopulation(EvolutionState state,
                               java.io.PrintWriter writer)

Overridden to include the archive size in the stream.

Overrides:

printSubpopulation in class Subpopulation

readSubpopulation

public void readSubpopulation(EvolutionState state,
                              java.io.LineNumberReader reader)
                       throws java.io.IOException

Overridden to include the archive size in the stream.

Overrides:

readSubpopulation in class Subpopulation

Throws:

java.io.IOException

writeSubpopulation

public void writeSubpopulation(EvolutionState state,
                               java.io.DataOutput dataOutput)
                        throws java.io.IOException

Overridden to include the archive size in the stream.

Overrides:

writeSubpopulation in class Subpopulation

Throws:

java.io.IOException

readSubpopulation

public void readSubpopulation(EvolutionState state,
                              java.io.DataInput dataInput)
                       throws java.io.IOException

Overridden to include the archive size in the stream.

Overrides:

readSubpopulation in class Subpopulation

Throws:

java.io.IOException