jenes.stage.operator.common

Class HeuristicCrossover<T extends DoubleChromosome>

java.lang.Object

jenes.stage.AbstractStage<T>

jenes.stage.operator.Operator<T>

jenes.stage.operator.Crossover<T>

jenes.stage.operator.common.HeuristicCrossover<T>

public class HeuristicCrossover<T extends DoubleChromosome>
extends Crossover<T>

A HeuristicCrossover performs a ordered convex combination of DoubleChromosome by a coefficient code.

Since:

2.0

Version:

2.0

Nested Class Summary

Nested classes/interfaces inherited from class jenes.stage.operator.Crossover

Crossover.Statistics

Field Summary

Fields

Modifier and Type	Field and Description
protected double	ratio Ratio of convex combination

Fields inherited from class jenes.stage.operator.Crossover

probability

Fields inherited from class jenes.stage.operator.Operator

random, statistics

Fields inherited from class jenes.stage.AbstractStage

biggerIsBetter, fitness, ga

Constructor Summary

Constructors

Constructor and Description
HeuristicCrossover(double p) Creates HeuristicCrossover
HeuristicCrossover(double p, double r) Creates HeuristicCrossover

Method Summary

Methods

Modifier and Type	Method and Description
protected void	cross(Individual<T>[] offsprings) Executes the crossover.
double	getRatio() Returns ratio
boolean	isRandom() Says if the ratio is random
void	setRandom() Sets the ratio random
void	setRatio(double r) Sets the ratio
int	spread() Returns the number of individuals involved by this crossover operator

Methods inherited from class jenes.stage.operator.Crossover

getProbability, init, process, setProbability

Methods inherited from class jenes.stage.operator.Operator

getStatistics, updateStatistics

Methods inherited from class jenes.stage.AbstractStage

dispose, getFitness, isBiggerBetter, isFitnessChanged, setBiggerIsBetter, setBiggerIsBetter, setFitness, setFitness

Methods inherited from class java.lang.Object

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

Field Detail

ratio

protected double ratio

Ratio of convex combination

Constructor Detail

HeuristicCrossover

public HeuristicCrossover(double p)

Creates HeuristicCrossover

Parameters:

p - crossover probability

HeuristicCrossover

public HeuristicCrossover(double p,
                  double r)

Creates HeuristicCrossover

Parameters:

p - crossover probability

r - ratio

Method Detail

getRatio

public final double getRatio()

Returns ratio

Returns:

setRatio

public void setRatio(double r)

Sets the ratio

Parameters:

r - a value between 0 and 1; if r = NaN, the ratio is set randomly at each iteration

isRandom

public final boolean isRandom()

Says if the ratio is random

Returns:

setRandom

public final void setRandom()

Sets the ratio random

spread

public int spread()

Description copied from class: Crossover

Returns the number of individuals involved by this crossover operator

Specified by:

spread in class Crossover<T extends DoubleChromosome>

Returns:

the number of individuals required by crossover

cross

protected void cross(Individual<T>[] offsprings)

Description copied from class: Crossover

Executes the crossover. At the invocation time the specified array contains the individuals to be modify by cross; at the return time it contains the output crossover individuals.

Specified by:

cross in class Crossover<T extends DoubleChromosome>

Parameters:

offsprings - the individuals to be modified.