Package org.uma.jmetal.qualityindicator.impl

Class GeneralizedSpread

java.lang.Object

org.uma.jmetal.qualityindicator.QualityIndicator

org.uma.jmetal.qualityindicator.impl.GeneralizedSpread

public class GeneralizedSpread
extends QualityIndicator

This class implements the generalized spread metric for two or more dimensions. Reference: A. Zhou, Y. Jin, Q. Zhang, B. Sendhoff, and E. Tsang Combining model-based and genetics-based offspring generation for multi-objective optimization using a convergence criterion, 2006 IEEE Congress on Evolutionary Computation, 2006, pp. 3234-3241.

Author:

Antonio J. Nebro, Juan J. Durillo

Field Summary

Fields inherited from class org.uma.jmetal.qualityindicator.QualityIndicator

referenceFront

Constructor Summary

Constructors

Constructor	Description
GeneralizedSpread()	Default constructor
GeneralizedSpread(double[][] referenceFront)	Constructor

Method Summary

Modifier and Type	Method	Description
double	compute(double[][] front)	Evaluate() method
String	description()
double	generalizedSpread(double[][] front, double[][] referenceFront)	Calculates the generalized spread metric.
boolean	isTheLowerTheIndicatorValueTheBetter()	Returns true if lower indicator values are preferred and false otherwise
String	name()
QualityIndicator	newInstance()

Methods inherited from class org.uma.jmetal.qualityindicator.QualityIndicator

referenceFront, referenceFront

Methods inherited from class java.lang.Object

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

Constructor Details

GeneralizedSpread

public GeneralizedSpread()

Default constructor

GeneralizedSpread

public GeneralizedSpread(double[][] referenceFront)

Constructor

Parameters:

referenceFront -

Throws:

FileNotFoundException

Method Details

newInstance

public QualityIndicator newInstance()

Specified by:

newInstance in class QualityIndicator

compute

public double compute(double[][] front)

Evaluate() method

Specified by:

compute in class QualityIndicator

Parameters:

front -

Returns:

generalizedSpread

public double generalizedSpread(double[][] front,
 double[][] referenceFront)

Calculates the generalized spread metric. Given the pareto front, the true pareto front as double [] and the number of objectives, the method return the value for the metric.

Parameters:

front - The front.

referenceFront - The reference pareto front.

Returns:

the value of the generalized spread metric

description

public String description()

Specified by:

description in class QualityIndicator

name

public String name()

Specified by:

name in class QualityIndicator

isTheLowerTheIndicatorValueTheBetter

public boolean isTheLowerTheIndicatorValueTheBetter()

Description copied from class: QualityIndicator

Returns true if lower indicator values are preferred and false otherwise

Specified by:

isTheLowerTheIndicatorValueTheBetter in class QualityIndicator