keel.Algorithms.Decision_Trees.CART.impurities

Class Gini

java.lang.Object

keel.Algorithms.Decision_Trees.CART.impurities.Gini

All Implemented Interfaces:

IImpurityFunction

public class Gini
extends java.lang.Object
implements IImpurityFunction

Implementation of GINI impurity Function

Constructor Summary

Constructors

Constructor and Description
Gini()

Method Summary

Modifier and Type	Method and Description
double	impurities(int[] patterns, double cost) It compute the impurity value associated
void	setDataset(DoubleTransposedDataSet dataset) It sets the datasets of patters

Methods inherited from class java.lang.Object

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

Constructor Detail

Gini

public Gini()

Method Detail

setDataset

public void setDataset(DoubleTransposedDataSet dataset)

It sets the datasets of patters

Specified by:

setDataset in interface IImpurityFunction

Parameters:

dataset - Complete data set of patterns

impurities

public double impurities(int[] patterns,
                         double cost)

It compute the impurity value associated

Specified by:

impurities in interface IImpurityFunction

Parameters:

patterns - index of patterns from dataset associated to node to evaluate

cost - Associated cost

Returns:

Impurity value associated