org.apache.commons.math.stat.descriptive.moment
Class VectorialMean

java.lang.Object
  org.apache.commons.math.stat.descriptive.moment.VectorialMean

All Implemented Interfaces:

java.io.Serializable

public class VectorialMean
extends java.lang.Object
implements java.io.Serializable

Returns the arithmetic mean of the available vectors.

Since:

1.2

Version:

$Revision: 619928 $ $Date: 2008-02-08 09:19:17 -0700 (Fri, 08 Feb 2008) $

See Also:

Serialized Form

Constructor Summary

VectorialMean(int dimension)
Constructs a VectorialMean.

Method Summary

long	getN() Get the number of vectors in the sample.
double[]	getResult() Get the mean vector.
void	increment(double[] v) Add a new vector to the sample.

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorialMean

public VectorialMean(int dimension)

Constructs a VectorialMean.

Parameters:

dimension - vectors dimension

Method Detail

increment

public void increment(double[] v)
               throws DimensionMismatchException

Add a new vector to the sample.

Parameters:

v - vector to add

Throws:

DimensionMismatchException - if the vector does not have the right dimension

getResult

public double[] getResult()

Get the mean vector.

Returns:

mean vector

getN

public long getN()

Get the number of vectors in the sample.

Returns:

number of vectors in the sample