org.apache.mahout.clustering

Interface GaussianAccumulator

All Known Implementing Classes:

OnlineGaussianAccumulator, RunningSumsGaussianAccumulator

public interface GaussianAccumulator

Method Summary

Methods

Modifier and Type	Method and Description
void	compute() Compute the mean, variance and standard deviation
double	getAverageStd()
Vector	getMean()
double	getN()
Vector	getStd()
Vector	getVariance()
void	observe(Vector x, double weight) Observe the vector

Method Detail

getN

double getN()

Returns:

the number of observations

getMean

Vector getMean()

Returns:

the mean of the observations

getStd

Vector getStd()

Returns:

the std of the observations

getAverageStd

double getAverageStd()

Returns:

the average of the vector std elements

getVariance

Vector getVariance()

Returns:

the variance of the observations

observe

void observe(Vector x,
           double weight)

Observe the vector

Parameters:

x - a Vector

weight - the double observation weight (usually 1.0)

compute

void compute()

Compute the mean, variance and standard deviation