cern.jet.random

Class VonMises

java.lang.Object

cern.colt.PersistentObject

cern.jet.random.AbstractDistribution

cern.jet.random.AbstractContinousDistribution

cern.jet.random.VonMises

All Implemented Interfaces:

DoubleFunction, IntFunction, Serializable, Cloneable

public class VonMises
extends AbstractContinousDistribution

Von Mises distribution.

Valid parameter ranges: k > 0.

Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.

Static methods operate on a default uniform random number generator; they are synchronized.

Implementation:

Method: Acceptance Rejection.

This is a port of mwc.c from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based upon

D.J. Best, N.I. Fisher (1979): Efficient simulation of the von Mises distribution, Appl. Statist. 28, 152-157.

Version:

1.0, 09/24/99

Author:

wolfgang.hoschek@cern.ch

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double	my_k
protected static VonMises	shared

Fields inherited from class cern.jet.random.AbstractDistribution

randomGenerator

Fields inherited from class cern.colt.PersistentObject

serialVersionUID

Constructor Summary

Constructors

Constructor and Description
VonMises(double freedom, RandomEngine randomGenerator) Constructs a Von Mises distribution.

Method Summary

Methods

Modifier and Type	Method and Description
double	nextDouble() Returns a random number from the distribution.
double	nextDouble(double k) Returns a random number from the distribution; bypasses the internal state.
void	setState(double k) Sets the distribution parameter.
static double	staticNextDouble(double freedom) Returns a random number from the distribution.
String	toString() Returns a String representation of the receiver.

Methods inherited from class cern.jet.random.AbstractDistribution

apply, apply, clone, getRandomGenerator, makeDefaultGenerator, nextInt, setRandomGenerator

Methods inherited from class java.lang.Object

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

Field Detail

my_k

protected double my_k

shared

protected static VonMises shared

Constructor Detail

VonMises

public VonMises(double freedom,
        RandomEngine randomGenerator)

Constructs a Von Mises distribution. Example: k=1.0.

Throws:

IllegalArgumentException - if k <= 0.0.

Method Detail

nextDouble

public double nextDouble()

Returns a random number from the distribution.

Specified by:

nextDouble in class AbstractDistribution

nextDouble

public double nextDouble(double k)

Returns a random number from the distribution; bypasses the internal state.

Throws:

IllegalArgumentException - if k <= 0.0.

setState

public void setState(double k)

Sets the distribution parameter.

Throws:

IllegalArgumentException - if k <= 0.0.

staticNextDouble

public static double staticNextDouble(double freedom)

Returns a random number from the distribution.

Throws:

IllegalArgumentException - if k <= 0.0.

toString

public String toString()

Returns a String representation of the receiver.

Overrides:

toString in class Object