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.

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 fitness of solutions in the population, updating the Fitness 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 fitness of solutions in the population, updating the Fitness 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