Package org.moeaframework.core.fitness

Class HypervolumeContributionFitnessEvaluator

java.lang.Object

org.moeaframework.core.fitness.HypervolumeContributionFitnessEvaluator

All Implemented Interfaces:

FitnessEvaluator

public class HypervolumeContributionFitnessEvaluator
extends Object
implements FitnessEvaluator

Assigns the fitness of solutions based on their contribution to the overall hypervolume.

Field Summary

Fields inherited from interface org.moeaframework.core.FitnessEvaluator

FITNESS_ATTRIBUTE

Constructor Summary

Constructors

Constructor	Description
HypervolumeContributionFitnessEvaluator(Problem problem)	Constructs a new hypervolume contribution fitness evaluator with an offset of 100.
HypervolumeContributionFitnessEvaluator(Problem problem, double offset)	Constructs a new hypervolume contribution fitness evaluator.

Method Summary

Modifier and Type	Method	Description
boolean	areLargerValuesPreferred()	Returns true if larger fitness values are preferred; otherwise smaller fitness values are preferred.
void	evaluate(Population population)	Evaluates the solutions in the specified population assigning the FITNESS_ATTRIBUTE attribute.

Methods inherited from class java.lang.Object

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

Constructor Details

HypervolumeContributionFitnessEvaluator

public HypervolumeContributionFitnessEvaluator(Problem problem)

Constructs a new hypervolume contribution fitness evaluator with an offset of 100.

Parameters:

problem - the problem

HypervolumeContributionFitnessEvaluator

public HypervolumeContributionFitnessEvaluator(Problem problem,
 double offset)

Constructs a new hypervolume contribution fitness evaluator.

Parameters:

problem - the problem

offset - the offset used when determining the reference point for the hypervolume calculation.

Method Details

evaluate

public void evaluate(Population population)

Description copied from interface: FitnessEvaluator

Evaluates the solutions in the specified population assigning the FITNESS_ATTRIBUTE attribute.

Specified by:

evaluate in interface FitnessEvaluator

Parameters:

population - the population to be evaluated

areLargerValuesPreferred

public boolean areLargerValuesPreferred()

Description copied from interface: FitnessEvaluator

Returns true if larger fitness values are preferred; otherwise smaller fitness values are preferred.

Specified by:

areLargerValuesPreferred in interface FitnessEvaluator

Returns:

true if larger fitness values are preferred; otherwise smaller fitness values are preferred