com.buffalokiwi.utils

Class MVS

java.lang.Object

com.buffalokiwi.utils.MVS

public class MVS
extends Object

Used to compute the mean, variance and standard deviation in 1 pass.

Author:

John Quinn

Constructor Summary

Constructors

Constructor and Description
MVS() Create a new MVS instance

Method Summary

Modifier and Type	Method and Description
void	calculate(double[] data) Calculate the mean, standard deviation and variance of a set
void	clear() Clear internal calculations
double	mean() Retrieve the mean from the last call to calculate()
int	size() Retrieve the number of values used in the last call to calculate()
double	stdev() Retrieve the standard deviation from the last call to calculate()
double	variance() Retrieve the variance from the last call to calculate()

Methods inherited from class java.lang.Object

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

Constructor Detail

MVS

public MVS()

Create a new MVS instance

Method Detail

clear

public void clear()

Clear internal calculations

calculate

public void calculate(double[] data)

Calculate the mean, standard deviation and variance of a set

Parameters:

data - data to calculate

size

public int size()

Retrieve the number of values used in the last call to calculate()

Returns:

size of set

mean

public double mean()

Retrieve the mean from the last call to calculate()

Returns:

mean

variance

public double variance()

Retrieve the variance from the last call to calculate()

Returns:

variance

stdev

public double stdev()

Retrieve the standard deviation from the last call to calculate()

Returns:

standard deviation