cern.jet.random.tdouble

Class Hyperbolic

java.lang.Object

cern.colt.PersistentObject

cern.jet.random.tdouble.AbstractDoubleDistribution

cern.jet.random.tdouble.AbstractContinousDoubleDistribution

cern.jet.random.tdouble.Hyperbolic

All Implemented Interfaces:

DoubleFunction, IntFunction, java.io.Serializable, java.lang.Cloneable

public class Hyperbolic
extends AbstractContinousDoubleDistribution

Hyperbolic distribution.

Valid parameter ranges: alpha > 0 and beta > 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: Non-Universal Rejection. High performance implementation.

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

L. Devroye (1986): Non-Uniform Random Variate Generation, Springer Verlag, New York.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Hyperbolic(double alpha, double beta, DoubleRandomEngine randomGenerator) Constructs a Beta distribution.

Method Summary

Modifier and Type	Method and Description
double	nextDouble() Returns a random number from the distribution.
double	nextDouble(double alpha, double beta) Returns a hyperbolic distributed random number; bypasses the internal state.
void	setState(double alpha, double beta) Sets the parameters.
static double	staticNextDouble(double alpha, double beta) Returns a random number from the distribution.
java.lang.String	toString() Returns a String representation of the receiver.

Methods inherited from class cern.jet.random.tdouble.AbstractDoubleDistribution

apply, apply, clone, makeDefaultGenerator, nextInt

Methods inherited from class java.lang.Object

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

Constructor Detail

Hyperbolic

public Hyperbolic(double alpha,
                  double beta,
                  DoubleRandomEngine randomGenerator)

Constructs a Beta distribution.

Method Detail

nextDouble

public double nextDouble()

Returns a random number from the distribution.

Specified by:

nextDouble in class AbstractDoubleDistribution

nextDouble

public double nextDouble(double alpha,
                         double beta)

Returns a hyperbolic distributed random number; bypasses the internal state.

setState

public void setState(double alpha,
                     double beta)

Sets the parameters.

staticNextDouble

public static double staticNextDouble(double alpha,
                                      double beta)

Returns a random number from the distribution.

toString

public java.lang.String toString()

Returns a String representation of the receiver.

Overrides:

toString in class java.lang.Object