org.apache.spark.mllib.tree.impurity

Class Gini

Object

org.apache.spark.mllib.tree.impurity.Gini

All Implemented Interfaces:

java.io.Serializable, Impurity

public class Gini
extends Object
implements Impurity

:: Experimental :: Class for calculating the Gini impurity during binary classification.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Gini()

Method Summary

Methods

Modifier and Type	Method and Description
static double	calculate(double c0, double c1) :: DeveloperApi :: Gini coefficient calculation
static double	calculate(double count, double sum, double sumSquares)

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.mllib.tree.impurity.Impurity

calculate, calculate

Constructor Detail

Gini

public Gini()

Method Detail

calculate

public static double calculate(double c0,
               double c1)

:: DeveloperApi :: Gini coefficient calculation

Parameters:

c0 - count of instances with label 0

c1 - count of instances with label 1

Returns:

Gini coefficient value

calculate

public static double calculate(double count,
               double sum,
               double sumSquares)