umontreal.iro.lecuyer.randvar
Class HyperbolicSecantGen

java.lang.Object
  umontreal.iro.lecuyer.randvar.RandomVariateGen
      umontreal.iro.lecuyer.randvar.HyperbolicSecantGen

public class HyperbolicSecantGen
extends RandomVariateGen

This class implements random variate generators for the hyperbolic secant distribution with location parameter μ and scale parameter σ. The density function of this distribution is

f (x) = 1/(2σ) sech(π/2(x - μ)/σ), - ∞ < x < ∞.

Constructor Summary

HyperbolicSecantGen(RandomStream s)
Creates a hyperbolic secant random variate generator with parameters μ = 0 and σ = 1, using stream s.

HyperbolicSecantGen(RandomStream s, double mu, double sigma)
Creates a hyperbolic secant random variate generator with parameters μ = mu and σ = sigma, using stream s.

HyperbolicSecantGen(RandomStream s, HyperbolicSecantDist dist)
Creates a new generator for the distribution dist, using stream s.

Method Summary

double	getMu() Returns the parameter μ of this object.
double	getSigma() Returns the parameter σ of this object.
static double	nextDouble(RandomStream s, double mu, double sigma) Generates a variate from the hyperbolic secant distribution with location parameter μ and scale parameter σ.

Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGen

getDistribution, getStream, nextArrayOfDouble, nextDouble, setStream, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

HyperbolicSecantGen

public HyperbolicSecantGen(RandomStream s,
                           double mu,
                           double sigma)

Creates a hyperbolic secant random variate generator with parameters μ = mu and σ = sigma, using stream s.

HyperbolicSecantGen

public HyperbolicSecantGen(RandomStream s)

Creates a hyperbolic secant random variate generator with parameters μ = 0 and σ = 1, using stream s.

HyperbolicSecantGen

public HyperbolicSecantGen(RandomStream s,
                           HyperbolicSecantDist dist)

Creates a new generator for the distribution dist, using stream s.

Method Detail

nextDouble

public static double nextDouble(RandomStream s,
                                double mu,
                                double sigma)

Generates a variate from the hyperbolic secant distribution with location parameter μ and scale parameter σ.

getMu

public double getMu()

Returns the parameter μ of this object.

getSigma

public double getSigma()

Returns the parameter σ of this object.