net.sf.doodleproject.numerics4j.random
Class LogNormalRandomVariable

java.lang.Object
  net.sf.doodleproject.numerics4j.random.AbstractContinuousRandomVariable
      net.sf.doodleproject.numerics4j.random.LogNormalRandomVariable

All Implemented Interfaces:

ContinuousRandomVariable

public class LogNormalRandomVariable
extends AbstractContinuousRandomVariable

A random variable generator for the Log Normal distribution.

References:

1. Wikipedia contributors, "Log-normal distribution," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/Lognormal_distribution

Since:

1.3

Version:

$Revision: 1.2 $ $Date: 2007/11/08 17:37:57 $

Constructor Summary

LogNormalRandomVariable()
Default constructor.

LogNormalRandomVariable(double m, double s)
Create a random variable with the given mean and standard deviation.

LogNormalRandomVariable(double m, double s, RNG source)
Create a random variable with the given parameters.

Method Summary

double	nextRandomVariable() Access the next random variable from this generator.
static double	nextRandomVariable(double m, double s, RNG source) Access the next random variable using the given generator.

Methods inherited from class net.sf.doodleproject.numerics4j.random.AbstractContinuousRandomVariable

getSource, nextRandomNumber

Methods inherited from class java.lang.Object

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

Constructor Detail

LogNormalRandomVariable

public LogNormalRandomVariable()

Default constructor. Mean is set to zero and standard deviation is set to one.

LogNormalRandomVariable

public LogNormalRandomVariable(double m,
                               double s)

Create a random variable with the given mean and standard deviation.

Parameters:

m - the mean.

s - the standard deviation.

LogNormalRandomVariable

public LogNormalRandomVariable(double m,
                               double s,
                               RNG source)

Create a random variable with the given parameters.

Parameters:

m - the mean.

s - the standard deviation.

source - the source generator.

Method Detail

nextRandomVariable

public static double nextRandomVariable(double m,
                                        double s,
                                        RNG source)

Access the next random variable using the given generator.

Parameters:

m - the mean.

s - the standard deviation.

source - the source generator.

Returns:

the next random variable.

nextRandomVariable

public double nextRandomVariable()

Access the next random variable from this generator.

Returns:

the next random variable.