pal.statistics
Class NormalDistribution

java.lang.Object
  pal.statistics.NormalDistribution

public class NormalDistribution
extends java.lang.Object

normal distribution (pdf, cdf, quantile)

Version:

$Id: NormalDistribution.java,v 1.3 2001/07/13 14:39:13 korbinian Exp $

Author:

Korbinian Strimmer

Constructor Summary

NormalDistribution()

Method Summary

static double	cdf(double x, double m, double sd) cumulative density function
static double	mean(double m, double sd) mean
static double	pdf(double x, double m, double sd) probability density function
static double	quantile(double z, double m, double sd) quantiles (=inverse cumulative density function)
static double	variance(double m, double sd) variance

Methods inherited from class java.lang.Object

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

Constructor Detail

NormalDistribution

public NormalDistribution()

Method Detail

pdf

public static double pdf(double x,
                         double m,
                         double sd)

probability density function

Parameters:

x - argument

m - mean

sd - standard deviation

Returns:

pdf at x

cdf

public static double cdf(double x,
                         double m,
                         double sd)

cumulative density function

Parameters:

x - argument

m - mean

sd - standard deviation

Returns:

cdf at x

quantile

public static double quantile(double z,
                              double m,
                              double sd)

quantiles (=inverse cumulative density function)

Parameters:

z - argument

m - mean

sd - standard deviation

Returns:

icdf at z

mean

public static double mean(double m,
                          double sd)

mean

Parameters:

m - mean

sd - standard deviation

Returns:

mean

variance

public static double variance(double m,
                              double sd)

variance

Parameters:

m - mean

sd - standard deviation

Returns:

variance