com.qualcomm.robotcore.util

Class Statistics

java.lang.Object

com.qualcomm.robotcore.util.Statistics

public class Statistics
extends java.lang.Object

This handy utility class supports the ongoing calculation of mean and variance of a series of numbers. This class is *not* thread-safe.

See Also:

Wikipedia

Constructor Summary

Constructors

Constructor and Description
Statistics()

Method Summary

Modifier and Type	Method and Description
void	add(double x) Adds a new sample to the statistics
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
void	remove(double x) Removes a sample from the statistics

Methods inherited from class java.lang.Object

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

Constructor Detail

Statistics

public Statistics()

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

Parameters:

x - the sample to add

remove

public void remove(double x)

Removes a sample from the statistics

Parameters:

x - the sample to remove