Package org.uma.jmetal.util

Class NormalizeUtils

java.lang.Object

org.uma.jmetal.util.NormalizeUtils

public class NormalizeUtils
extends Object

Class responsible for normalizing values

Since:

2018-12-16

Version:

1.0.0

Author:

Thiago Ferreira

Method Summary

Modifier and Type	Method	Description
static double[]	getMaxValuesOfTheColumnsOfAMatrix(double[][] matrix)	Returns a vector with the maximum values of the columns of a matrix
static double[]	getMinValuesOfTheColumnsOfAMatrix(double[][] matrix)	Returns a vector with the minimum values of the columns of a matrix
static double[]	getNormalizedVector(double[] vector, double min, double max)	Normalizes a vector of double values
static double[][]	normalize(double[][] matrix)	Normalize the vectors (rows) of bi-dimensional matrix
static double[][]	normalize(double[][] matrix, double[] minRangeValue, double[] maxRangeValue)	Normalize the vectors (rows) of bi-dimensional matrix
static double	normalize(double value, double min, double max)	It normalizes a value in [0,1] given a min and max value.
static double	normalize(double value, double minRangeValue, double maxRangeValue, double min, double max)	It normalizes a value in a range [a, b] given a min and max value.

Methods inherited from class java.lang.Object

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

Method Details

normalize

public static double normalize(double value,
 double minRangeValue,
 double maxRangeValue,
 double min,
 double max)

It normalizes a value in a range [a, b] given a min and max value. The equation used here were based on the following links:

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Parameters:

value - value number to be normalized

minRangeValue - the minimum value for the range

maxRangeValue - the maximum value for the range

min - minimum value that value can take on

max - maximum value that value can take on

Returns:

the normalized number

normalize

public static double normalize(double value,
 double min,
 double max)

It normalizes a value in [0,1] given a min and max value.

Parameters:

value - number to be normalized

min - minimum value that value can take on

max - maximum value that value can take on

Returns:

the normalized number

normalize

public static double[][] normalize(double[][] matrix)

Normalize the vectors (rows) of bi-dimensional matrix

Parameters:

matrix -

Returns:

A matrix with normalized values for each of its rows

normalize

public static double[][] normalize(double[][] matrix,
 double[] minRangeValue,
 double[] maxRangeValue)

Normalize the vectors (rows) of bi-dimensional matrix

Parameters:

matrix -

Returns:

A matrix with normalized values for each of its rows

getNormalizedVector

public static double[] getNormalizedVector(double[] vector,
 double min,
 double max)

Normalizes a vector of double values

Parameters:

vector -

Returns:

The normalized vector

getMinValuesOfTheColumnsOfAMatrix

public static double[] getMinValuesOfTheColumnsOfAMatrix(double[][] matrix)

Returns a vector with the minimum values of the columns of a matrix

Parameters:

matrix -

Returns:

getMaxValuesOfTheColumnsOfAMatrix

public static double[] getMaxValuesOfTheColumnsOfAMatrix(double[][] matrix)

Returns a vector with the maximum values of the columns of a matrix

Parameters:

matrix -

Returns: