org.apache.commons.math.stat.univariate.moment
Class ThirdMoment

java.lang.Object
  extended byorg.apache.commons.math.stat.univariate.AbstractUnivariateStatistic
      extended byorg.apache.commons.math.stat.univariate.AbstractStorelessUnivariateStatistic
          extended byorg.apache.commons.math.stat.univariate.moment.FirstMoment
              extended byorg.apache.commons.math.stat.univariate.moment.SecondMoment
                  extended byorg.apache.commons.math.stat.univariate.moment.ThirdMoment
All Implemented Interfaces:
Serializable, StorelessUnivariateStatistic, UnivariateStatistic
Direct Known Subclasses:
FourthMoment

public class ThirdMoment
extends SecondMoment
implements Serializable

The ThirdMoment (arithmentic mean) is calculated using the following recursive strategy . Both incremental and evaluation strategies currently use this approach.

Version:
$Revision: 1.12 $ $Date: 2003/11/19 03:28:24 $
See Also:
Serialized Form

Field Summary
protected  double m3
          third moment of values that have been added
protected  double n2
          temporary internal state made availabel for higher order moments
protected  double prevM2
          temporary internal state made availabel for higher order moments
protected  double v2
          temporary internal state made availabel for higher order moments
 
Fields inherited from class org.apache.commons.math.stat.univariate.moment.SecondMoment
m2, n1
 
Fields inherited from class org.apache.commons.math.stat.univariate.moment.FirstMoment
dev, m1, n, n0, v
 
Constructor Summary
ThirdMoment()
           
 
Method Summary
 void clear()
          Clears all the internal state of the Statistic
 double getResult()
          Returns the current state of the statistic after the last increment.
 void increment(double d)
          Increments the internal state of the Storagless Implementation.
 
Methods inherited from class org.apache.commons.math.stat.univariate.moment.FirstMoment
getN
 
Methods inherited from class org.apache.commons.math.stat.univariate.AbstractStorelessUnivariateStatistic
evaluate
 
Methods inherited from class org.apache.commons.math.stat.univariate.AbstractUnivariateStatistic
evaluate, test
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.commons.math.stat.univariate.UnivariateStatistic
evaluate
 

Field Detail

m3

protected double m3
third moment of values that have been added


v2

protected double v2
temporary internal state made availabel for higher order moments


n2

protected double n2
temporary internal state made availabel for higher order moments


prevM2

protected double prevM2
temporary internal state made availabel for higher order moments

Constructor Detail

ThirdMoment

public ThirdMoment()
Method Detail

increment

public void increment(double d)
Description copied from interface: StorelessUnivariateStatistic
Increments the internal state of the Storagless Implementation.

Specified by:
increment in interface StorelessUnivariateStatistic
Overrides:
increment in class SecondMoment
See Also:
StorelessUnivariateStatistic.increment(double)

getResult

public double getResult()
Description copied from interface: StorelessUnivariateStatistic
Returns the current state of the statistic after the last increment.

Specified by:
getResult in interface StorelessUnivariateStatistic
Overrides:
getResult in class SecondMoment
See Also:
StorelessUnivariateStatistic.getResult()

clear

public void clear()
Description copied from interface: StorelessUnivariateStatistic
Clears all the internal state of the Statistic

Specified by:
clear in interface StorelessUnivariateStatistic
Overrides:
clear in class SecondMoment
See Also:
StorelessUnivariateStatistic.clear()


Copyright © 2003-2004 Apache Software Foundation. All Rights Reserved.