com.aoindustries.math

Class Statistics

java.lang.Object

com.aoindustries.math.Statistics

public class Statistics
extends Object

Some basic statistics algorithms.

Author:

AO Industries, Inc.

Method Summary

Modifier and Type	Method and Description
static double	mean(Collection<? extends Number> samples) Computes the average of a set of samples.
static double	standardDeviation(double mean, Collection<? extends Number> samples) Computes the standard deviation of a set of samples.

Methods inherited from class java.lang.Object

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

Method Detail

mean

public static double mean(Collection<? extends Number> samples)

Computes the average of a set of samples. null values will be ignored, not contributing to the average in any way.

Parameters:

samples - must have at least one sample

Returns:

Double.NaN if there are no samples

standardDeviation

public static double standardDeviation(double mean,
                                       Collection<? extends Number> samples)

Computes the standard deviation of a set of samples. null values will be ignored, not contributing to the deviation in any way. This does not use Bessel's correction.