org.uma.jmetal.problem.multiobjective.wfg

Class WFG

java.lang.Object

org.uma.jmetal.problem.impl.AbstractGenericProblem<DoubleSolution>

org.uma.jmetal.problem.impl.AbstractDoubleProblem

org.uma.jmetal.problem.multiobjective.wfg.WFG

All Implemented Interfaces:

Serializable, DoubleProblem, Problem<DoubleSolution>

Direct Known Subclasses:

WFG1, WFG2, WFG3, WFG4, WFG5, WFG6, WFG7, WFG8, WFG9

public abstract class WFG
extends AbstractDoubleProblem

Implements a reference abstract class for all wfg org.uma.test problem Reference: Simon Huband, Luigi Barone, Lyndon While, Phil Hingston A Scalable Multi-objective Test Problem Toolkit. Evolutionary Multi-Criterion Optimization: Third International Conference, EMO 2005. Proceedings, volume 3410 of Lecture Notes in Computer Science

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	a
protected int	d
protected int	k
protected int	l
protected int	m
protected Random	random
protected int[]	s

Constructor Summary

Constructors

Constructor and Description
WFG(Integer k, Integer l, Integer M) Constructor Creates a wfg problem

Method Summary

Modifier and Type	Method and Description
float[]	calculateX(float[] t) Gets the x vector
float	correctTo01(float a)
DoubleSolution	createSolution()
abstract float[]	evaluate(float[] variables) Evaluates a solution
float[]	normalise(float[] z) Normalizes a vector (consulte wfg toolkit reference)
float[]	subVector(float[] z, int head, int tail) Gets a subvector of a given vector (Head inclusive and tail inclusive)

Methods inherited from class org.uma.jmetal.problem.impl.AbstractDoubleProblem

getLowerBound, getUpperBound, setLowerLimit, setUpperLimit

Methods inherited from class org.uma.jmetal.problem.impl.AbstractGenericProblem

getName, getNumberOfConstraints, getNumberOfObjectives, getNumberOfVariables, setName, setNumberOfConstraints, setNumberOfObjectives, setNumberOfVariables

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.uma.jmetal.problem.Problem

evaluate, getName, getNumberOfConstraints, getNumberOfObjectives, getNumberOfVariables

Field Detail

k

protected int k

m

protected int m

l

protected int l

a

protected int[] a

s

protected int[] s

d

protected int d

random

protected Random random

Constructor Detail

WFG

public WFG(Integer k,
           Integer l,
           Integer M)

Constructor Creates a wfg problem

Parameters:

k - position-related parameters

l - distance-related parameters

M - Number of objectives

Method Detail

createSolution

public DoubleSolution createSolution()

Specified by:

createSolution in interface Problem<DoubleSolution>

Overrides:

createSolution in class AbstractDoubleProblem

calculateX

public float[] calculateX(float[] t)

Gets the x vector

normalise

public float[] normalise(float[] z)

Normalizes a vector (consulte wfg toolkit reference)

correctTo01

public float correctTo01(float a)

subVector

public float[] subVector(float[] z,
                         int head,
                         int tail)

Gets a subvector of a given vector (Head inclusive and tail inclusive)

Parameters:

z - the vector

Returns:

the subvector

evaluate

public abstract float[] evaluate(float[] variables)

Evaluates a solution

Parameters:

variables - The solution to evaluate

Returns:

a double [] with the evaluation results