jenes.stage.operator

Class Scaling<T extends Chromosome>

java.lang.Object

jenes.stage.AbstractStage<T>

jenes.stage.operator.Operator<T>

jenes.stage.operator.Scaling<T>

Direct Known Subclasses:

ProportionalScaling, RankScaling, TopScaling

public abstract class Scaling<T extends Chromosome>
extends Operator<T>

This class of operators performs fitness scaling. They can be implemented by overwriting the method scale

Since:

2.0

Version:

2.0

Nested Class Summary

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

Operator.Statistics

Field Summary

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
Scaling() Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	process(Population<T> in, Population<T> out) Processes the input population and tranforms it into the output population.
abstract void	scale(Population<T> pop) Method used to scale the fitness of indivduals belonging to given Population

Methods inherited from class jenes.stage.operator.Operator

getStatistics, updateStatistics

Methods inherited from class jenes.stage.AbstractStage

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Scaling

public Scaling()

Constructor

Method Detail

process

public final void process(Population<T> in,
           Population<T> out)
                   throws StageException

Description copied from class: AbstractStage

Processes the input population and tranforms it into the output population. Note: - Out population is made of recicled individuals. There is a need of new individuals to add only when there is a need to increase the population size. For pre-initalized individual just use setAs method. This is done for an efficient memory management. - A stage can modify the input population. So input passed to process method can be mutated when the process method ends.

Specified by:

process in class AbstractStage<T extends Chromosome>

Parameters:

in - the input population

out - the output population

Throws:

StageException

scale

public abstract void scale(Population<T> pop)

Method used to scale the fitness of indivduals belonging to given Population

Parameters:

pop - population of individuals to scale