edu.udo.cs.yale.operator.features.aggregation
Class AggregationCrossover

java.lang.Object
  edu.udo.cs.yale.operator.features.aggregation.AggregationCrossover

public class AggregationCrossover
extends java.lang.Object

Performs a usual GA crossover on integer arrays. Supports one-point and uniform crossover.

Version:

$Id: AggregationCrossover.java,v 1.3 2006/03/27 13:21:58 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

static int	CROSSOVER_ONE_POINT Indicates a one-point crossover type.
static java.lang.String[]	CROSSOVER_TYPES The names for the crossover types.
static int	CROSSOVER_UNIFORM Indicates a uniform crossover type.
private double	crossoverProb The crossover probability.
private int	crossoverType The crossover type.
private java.util.Random	random

Constructor Summary

AggregationCrossover(int type, double probability, java.util.Random random)
Creates a new aggregation crossover operator.

Method Summary

private void	crossover(int[] individual1, int[] individual2) Changes the individual.
void	crossover(java.util.List<AggregationIndividual> population) Randomly selects parents from the population and performs crossover.
private boolean	isValid(int[] individual) Checks if at least one feature is selected.

Methods inherited from class java.lang.Object

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

Field Detail

CROSSOVER_TYPES

public static final java.lang.String[] CROSSOVER_TYPES

The names for the crossover types.

CROSSOVER_ONE_POINT

public static final int CROSSOVER_ONE_POINT

Indicates a one-point crossover type.

See Also:

Constant Field Values

CROSSOVER_UNIFORM

public static final int CROSSOVER_UNIFORM

Indicates a uniform crossover type.

See Also:

Constant Field Values

crossoverType

private int crossoverType

The crossover type.

crossoverProb

private double crossoverProb

The crossover probability.

random

private java.util.Random random

Constructor Detail

AggregationCrossover

public AggregationCrossover(int type,
                            double probability,
                            java.util.Random random)

Creates a new aggregation crossover operator.

Method Detail

isValid

private boolean isValid(int[] individual)

Checks if at least one feature is selected.

crossover

public void crossover(java.util.List<AggregationIndividual> population)

Randomly selects parents from the population and performs crossover. The parents are kept.

crossover

private void crossover(int[] individual1,
                       int[] individual2)

Changes the individual. Make clones if original individuals should be kept.