org.uma.jmetal.qualityindicator.impl

Class GeneralizedSpread<S extends Solution<?>>

java.lang.Object

org.uma.jmetal.util.naming.impl.SimpleDescribedEntity

org.uma.jmetal.qualityindicator.impl.GenericIndicator<S>

org.uma.jmetal.qualityindicator.impl.GeneralizedSpread<S>

All Implemented Interfaces:

Serializable, QualityIndicator<List<S>,Double>, DescribedEntity

public class GeneralizedSpread<S extends Solution<?>>
extends GenericIndicator<S>

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

See Also:

Serialized Form

Field Summary

Fields inherited from class org.uma.jmetal.qualityindicator.impl.GenericIndicator

referenceParetoFront

Constructor Summary

Constructors

Constructor and Description
GeneralizedSpread() Default constructor
GeneralizedSpread(Front referenceParetoFront) Constructor
GeneralizedSpread(String referenceParetoFrontFile) Constructor

Method Summary

Modifier and Type	Method and Description
Double	evaluate(List<S> solutionList) Evaluate() method
double	generalizedSpread(Front front, Front referenceFront) Calculates the generalized spread metric.
String	getDescription()
String	getName()
boolean	isTheLowerTheIndicatorValueTheBetter() This method returns true if lower indicator values are preferred and false otherwise

Methods inherited from class org.uma.jmetal.qualityindicator.impl.GenericIndicator

setReferenceParetoFront, setReferenceParetoFront

Methods inherited from class org.uma.jmetal.util.naming.impl.SimpleDescribedEntity

setDescription, setName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

GeneralizedSpread

public GeneralizedSpread()

Default constructor

GeneralizedSpread

public GeneralizedSpread(String referenceParetoFrontFile)
                  throws FileNotFoundException

Constructor

Parameters:

referenceParetoFrontFile -

Throws:

FileNotFoundException

GeneralizedSpread

public GeneralizedSpread(Front referenceParetoFront)

Constructor

Parameters:

referenceParetoFront -

Throws:

FileNotFoundException

Method Detail

evaluate

public Double evaluate(List<S> solutionList)

Evaluate() method

Parameters:

solutionList -

Returns:

generalizedSpread

public double generalizedSpread(Front front,
                                Front 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

getName

public String getName()

Specified by:

getName in interface DescribedEntity

Overrides:

getName in class SimpleDescribedEntity

Returns:

the name of the DescribedEntity

getDescription

public String getDescription()

Specified by:

getDescription in interface DescribedEntity

Overrides:

getDescription in class SimpleDescribedEntity

Returns:

the description of the DescribedEntity

isTheLowerTheIndicatorValueTheBetter

public boolean isTheLowerTheIndicatorValueTheBetter()

Description copied from class: GenericIndicator

This method returns true if lower indicator values are preferred and false otherwise

Specified by:

isTheLowerTheIndicatorValueTheBetter in class GenericIndicator<S extends Solution<?>>

Returns: