edu.udo.cs.yale.operator.learner
Class DiscreteDistribution

java.lang.Object
  edu.udo.cs.yale.operator.learner.DiscreteDistribution

All Implemented Interfaces:

Distribution

public class DiscreteDistribution
extends java.lang.Object
implements Distribution

DiscreteDistribution is an distribution for nominal values. For probability calculation it counts the frequency of all values and returns this number + 1 of the given value divided by the total number of all examples + the number of different values.

Version:

$Id$

Author:

Sebastian Land

Field Summary

(package private) java.util.ArrayList<java.lang.Double>	occurences
(package private) int	totalOccurences
(package private) double	totalProbability
(package private) int	totalValueNumber
(package private) java.util.ArrayList<java.lang.Double>	values

Constructor Summary

DiscreteDistribution(java.util.Set<java.lang.Double> possibleValues, int possibleValueNumber, java.util.Collection<java.lang.Double> allValues)

Method Summary

double	getProbability(double x) This method returns the density of the given distribution at the specified value
java.lang.String	toString() Should return an textual representation of the distribution.

Methods inherited from class java.lang.Object

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

Field Detail

values

java.util.ArrayList<java.lang.Double> values

occurences

java.util.ArrayList<java.lang.Double> occurences

totalOccurences

int totalOccurences

totalValueNumber

int totalValueNumber

totalProbability

double totalProbability

Constructor Detail

DiscreteDistribution

public DiscreteDistribution(java.util.Set<java.lang.Double> possibleValues,
                            int possibleValueNumber,
                            java.util.Collection<java.lang.Double> allValues)

Method Detail

getProbability

public double getProbability(double x)

Description copied from interface: Distribution

This method returns the density of the given distribution at the specified value

Specified by:

getProbability in interface Distribution

Parameters:

x - the value which density shall be returned

toString

public java.lang.String toString()

Description copied from interface: Distribution

Should return an textual representation of the distribution.

Specified by:

toString in interface Distribution

Overrides:

toString in class java.lang.Object