keel.Algorithms.Fuzzy_Instance_Based_Learning

Class Util

java.lang.Object

keel.Algorithms.Fuzzy_Instance_Based_Learning.Util

public class Util
extends java.lang.Object

File: Util.java Auxiliar class with useful function for working with fuzzy instance learning based methods

Since:

JDK1.5

Version:

1.0

Author:

Written by Joaquín Derrac (University of Granada) 13/11/2012

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static double	euclideanDistance(double[] instance1, double[] instance2) Computes the Euclidean distance between two instances (L2 norm)
static double	euclideanDistanceNS(double[] instance1, double[] instance2) Computes the unsquared Euclidean distance between two instances (L1 norm)
static void	print(java.lang.String text) Prints a text in the standard output
static void	printInstance(double[] instance) Generates a string with the contents of the instance
static void	printMatrix(double[][] data) Generates a string with the contents of a data matrix
static boolean	same(double[] a, double[] b) Checks if two instances are the same

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

euclideanDistance

public static double euclideanDistance(double[] instance1,
                                       double[] instance2)

Computes the Euclidean distance between two instances (L2 norm)

Parameters:

instance1 - First instance

instance2 - Second instance

Returns:

The Euclidean distance

euclideanDistanceNS

public static double euclideanDistanceNS(double[] instance1,
                                         double[] instance2)

Computes the unsquared Euclidean distance between two instances (L1 norm)

Parameters:

instance1 - First instance

instance2 - Second instance

Returns:

The unsquared Euclidean distance

same

public static boolean same(double[] a,
                           double[] b)

Checks if two instances are the same

Parameters:

a - First instance

b - Second instance

Returns:

True if both instances are equal.

printInstance

public static void printInstance(double[] instance)

Generates a string with the contents of the instance

Parameters:

instance - Instance to print.

printMatrix

public static void printMatrix(double[][] data)

Generates a string with the contents of a data matrix

Parameters:

data - Data matrix to print.

print

public static void print(java.lang.String text)

Prints a text in the standard output

Parameters:

text - Text to print