com.qualcomm.robotcore.util

Class MovingStatistics

java.lang.Object

com.qualcomm.robotcore.util.MovingStatistics

public class MovingStatistics
extends java.lang.Object

MovingStatistics keeps statistics on the most recent samples in a data set, automatically removing old samples as the size of the data exceeds a fixed capacity. This class is *not* thread-safe.

Constructor Summary

Constructors

Constructor and Description
MovingStatistics(int capacity)

Method Summary

Modifier and Type	Method and Description
void	add(double x) Adds a new sample to the statistics, possibly also removing the oldest.
void	clear() Resets the statistics to an empty state
int	getCount() Returns the current number of samples
double	getMean() Returns the mean of the current set of samples
double	getStandardDeviation() Returns the sample standard deviation of the current set of samples
double	getVariance() Returns the sample variance of the current set of samples

Methods inherited from class java.lang.Object

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

Constructor Detail

MovingStatistics

public MovingStatistics(int capacity)

Method Detail

getCount

public int getCount()

Returns the current number of samples

Returns:

the number of samples

getMean

public double getMean()

Returns the mean of the current set of samples

Returns:

the mean of the samples

getVariance

public double getVariance()

Returns the sample variance of the current set of samples

Returns:

the variance of the samples

getStandardDeviation

public double getStandardDeviation()

Returns the sample standard deviation of the current set of samples

Returns:

the standard deviation of the samples

clear

public void clear()

Resets the statistics to an empty state

add

public void add(double x)

Adds a new sample to the statistics, possibly also removing the oldest.

Parameters:

x - the sample to add