Package jdistlib

Class HalfNormal

java.lang.Object

jdistlib.generic.GenericDistribution

jdistlib.HalfNormal

public class HalfNormal
extends GenericDistribution

Half-normal distribution, the distribution of the absolute value of a zero-centered normal variate with scale sigma.

The parameterization follows the GPL-2 extraDistr dhnorm API.

Field Summary

Fields inherited from class jdistlib.generic.GenericDistribution

random

Constructor Summary

Constructors

Constructor	Description
HalfNormal(double sigma)

Method Summary

Modifier and Type	Method	Description
double	cumulative(double x, boolean lowerTail, boolean logP)
static double	cumulative(double x, double sigma, boolean lowerTail, boolean logP)
double	density(double x, boolean log)
static double	density(double x, double sigma, boolean giveLog)
double	quantile(double p, boolean lowerTail, boolean logP)
static double	quantile(double p, double sigma, boolean lowerTail, boolean logP)
double	random()
static double	random(double sigma, RandomEngine random)
static double[]	random(int n, double sigma, RandomEngine random)

Methods inherited from class jdistlib.generic.GenericDistribution

copyBackward, cumulative, cumulative, cumulative, cumulative_hazard, cumulative_hazard, cumulativeInto, density, density, densityInto, getRandomEngine, hazard, hazard, inverse_survival, inverse_survival, quantile, quantile, quantile, quantileInto, random, random, randomInto, setRandomEngine, survival, survival, survival

Methods inherited from class java.lang.Object

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

Constructor Details

HalfNormal

public HalfNormal(double sigma)

Method Details

density

public static double density(double x,
 double sigma,
 boolean giveLog)

cumulative

public static double cumulative(double x,
 double sigma,
 boolean lowerTail,
 boolean logP)

quantile

public static double quantile(double p,
 double sigma,
 boolean lowerTail,
 boolean logP)

random

public static double random(double sigma,
 RandomEngine random)

random

public static double[] random(int n,
 double sigma,
 RandomEngine random)

density

public double density(double x,
 boolean log)

Specified by:

density in class GenericDistribution

cumulative

public double cumulative(double x,
 boolean lowerTail,
 boolean logP)

Specified by:

cumulative in class GenericDistribution

quantile

public double quantile(double p,
 boolean lowerTail,
 boolean logP)

Specified by:

quantile in class GenericDistribution

random

public double random()

Specified by:

random in class GenericDistribution