Package org.uma.jmetal.util

Class VectorUtils

java.lang.Object

org.uma.jmetal.util.VectorUtils

public class VectorUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
VectorUtils()

Method Summary

Modifier and Type	Method	Description
static double	distanceToClosestVector(double[] vector, double[][] front)
static double	distanceToClosestVector(double[] vector, double[][] front, Distance<double[],double[]> distance)
static double	distanceToNearestVector(double[] vector, double[][] front)
static double	distanceToNearestVector(double[] vector, double[][] front, Distance<double[],double[]> distance)
static int	dominanceTest(double[] vector1, double[] vector2)	Method that apply a dominance test between two vectors.
static double[][]	getInvertedFront(double[][] front)	This method receives a normalized front and return the inverted one.
static boolean	isVectorDominatedByAFront(double[] vector, double[][] front)	Checks whether a vector is dominated by a front
static double[][]	readVectors(String filePath)
static double[][]	readVectors(String filePath, String separator)
static double[]	toArray(List<Double> list)	Converts a list of doubles to an array

Methods inherited from class java.lang.Object

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

Constructor Details

VectorUtils

public VectorUtils()

Method Details

dominanceTest

public static int dominanceTest(double[] vector1,
 double[] vector2)

Method that apply a dominance test between two vectors. It is assumed that the vectors have been properly tested before calling this method to ensure that they have the same length

Parameters:

vector1 -

vector2 -

Returns:

0 if the vectors are non-dominated, -1 if vector1 dominates vector2, and 1 if vector2 dominates vector 1

readVectors

public static double[][] readVectors(String filePath,
 String separator)
                              throws IOException

Parameters:

filePath - the file need to read

Returns:

referenceVectors. referenceVectors[i][j] means the i-th vector's j-th value

Throws:

JMetalException - if error while read file

IOException

readVectors

public static double[][] readVectors(String filePath)
                              throws IOException

Throws:

IOException

isVectorDominatedByAFront

public static boolean isVectorDominatedByAFront(double[] vector,
 double[][] front)

Checks whether a vector is dominated by a front

Parameters:

vector -

front -

Returns:

distanceToClosestVector

public static double distanceToClosestVector(double[] vector,
 double[][] front)

distanceToClosestVector

public static double distanceToClosestVector(double[] vector,
 double[][] front,
 Distance<double[],double[]> distance)

distanceToNearestVector

public static double distanceToNearestVector(double[] vector,
 double[][] front)

distanceToNearestVector

public static double distanceToNearestVector(double[] vector,
 double[][] front,
 Distance<double[],double[]> distance)

getInvertedFront

public static double[][] getInvertedFront(double[][] front)

This method receives a normalized front and return the inverted one. This method is for minimization problems

Parameters:

front - The front

Returns:

The inverted front

toArray

public static double[] toArray(List<Double> list)

Converts a list of doubles to an array

Parameters:

list -

Returns: