jsat.math

Class DescriptiveStatistics

java.lang.Object

jsat.math.DescriptiveStatistics

public class DescriptiveStatistics
extends Object

Author:

Edward Raff

Constructor Summary

Constructors

Constructor and Description
DescriptiveStatistics()

Method Summary

Modifier and Type	Method and Description
static double	sampleCorCoeff(Vec xData, Vec yData) Computes the sample correlation coefficient for two data sets X and Y.
static double[]	summaryStats(Vec xData, Vec yData) Computes several summary statistics from the two data sets.

Methods inherited from class java.lang.Object

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

Constructor Detail

DescriptiveStatistics

public DescriptiveStatistics()

Method Detail

sampleCorCoeff

public static double sampleCorCoeff(Vec xData,
                                    Vec yData)

Computes the sample correlation coefficient for two data sets X and Y. The lengths of X and Y must be the same, and each element in X should correspond to the element in Y.

Parameters:

yData - the Y data set

xData - the X data set

Returns:

the sample correlation coefficient

summaryStats

public static double[] summaryStats(Vec xData,
                                    Vec yData)

Computes several summary statistics from the two data sets. These are:
Index 0: S_x
Index 1: S_y
Index 2: S_xx
Index 3: S_yy
Index 4: S_xy

Parameters:

xData - the x values of the data set

yData - the y values of the data set

Returns:

several summary statistics of the 2 variables