gr.demokritos.iit.jinsect.algorithms.statistics
Class KLDivergenceCalculator

java.lang.Object
  gr.demokritos.iit.jinsect.algorithms.statistics.KLDivergenceCalculator

public class KLDivergenceCalculator
extends java.lang.Object

Computes the entropy based KL Divergence between two distributions

Constructor Summary

KLDivergenceCalculator()

Method Summary

static double	KL_asymmetric(Distribution p, Distribution q) The static method where the computation of KL_asymmetric is performed.
static double	KL_symmetric(Distribution p, Distribution q) The static method where the computation of symmetric KL is performed.

Methods inherited from class java.lang.Object

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

Constructor Detail

KLDivergenceCalculator

public KLDivergenceCalculator()

Method Detail

KL_asymmetric

public static double KL_asymmetric(Distribution p,
                                   Distribution q)

The static method where the computation of KL_asymmetric is performed. This measure is asymmetric and non-negative.

Parameters:

p - the first Distribution.

q - the second Distribution.

Returns:

zero if q and p are equal

KL_symmetric

public static double KL_symmetric(Distribution p,
                                  Distribution q)

The static method where the computation of symmetric KL is performed. This measure is symmetric and non-negative.

Parameters:

p - the first Distribution.

q - the second Distribution.

Returns:

zero if q and p are equal