jmetal.qualityIndicator
Class Spread

java.lang.Object
  jmetal.qualityIndicator.Spread

public class Spread
extends java.lang.Object

This class implements the spread quality indicator. It can be used also as command line program just by typing: "java jmetal.qualityIndicator.Spread ". This metric is only applicable to two bi-objective problems. Reference: Deb, K., Pratap, A., Agarwal, S., Meyarivan, T.: A fast and elitist multiobjective genetic algorithm: NSGA-II. IEEE Trans. on Evol. Computation 6 (2002) 182-197

Field Summary

static MetricsUtil

utils_

Constructor Summary

Spread()
Constructor.

Method Summary

static void	main(java.lang.String[] args) This class can be invoqued from the command line.
double	spread(double[][] front, double[][] trueParetoFront, int numberOfObjectives) Calculates the Spread metric.

Methods inherited from class java.lang.Object

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

Field Detail

utils_

public static MetricsUtil utils_

Constructor Detail

Spread

public Spread()

Constructor. Creates a new instance of a Spread object

Method Detail

spread

public double spread(double[][] front,
                     double[][] trueParetoFront,
                     int numberOfObjectives)

Calculates the Spread metric. Given the front, the true pareto front as double [], and the number of objectives, the method returns the value of the metric.

Parameters:

front - The front.

trueParetoFront - The true pareto front.

numberOfObjectives - The number of objectives.

main

public static void main(java.lang.String[] args)

This class can be invoqued from the command line. Three params are required: 1) the name of the file containing the front, 2) the name of the file containig the true Pareto front 3) the number of objectives