Class Normal

java.lang.Object

eduni.distributions.Generator

eduni.distributions.Normal

All Implemented Interfaces:

ContinuousGenerator, Seedable

Direct Known Subclasses:

LogNormal

public class Normal
extends Generator
implements ContinuousGenerator

A random number generator based on the normal distribution.

Version:

1.0, 2 October 2002

Author:

F.Mallet from Costas Simatos's original

Field Summary

Fields

Modifier and Type	Field	Description
protected double	mean
protected double	std_dev

Fields inherited from class Generator

distrib

Constructor Summary

Constructors

Constructor	Description
Normal(double mean, double variance)	the seed is automatically provided by the SeedGenerator
Normal(double mean, double variance, long seed)	The constructor with which a specific seed is set for the random number generator

Method Summary

Modifier and Type	Method	Description
double	sample()	Generate a new random number.

Methods inherited from class Generator

getSeed, reseed, setSeed

Methods inherited from class Object

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

Methods inherited from interface Seedable

getSeed, reseed, setSeed

Field Details

mean

protected double mean

std_dev

protected double std_dev

Constructor Details

Normal

public Normal(double mean,
 double variance)

the seed is automatically provided by the SeedGenerator

Parameters:

mean - The mean of the distribution

variance - The variance of the distribution

Normal

public Normal(double mean,
 double variance,
 long seed)

The constructor with which a specific seed is set for the random number generator

Parameters:

mean - The mean of the distribution

variance - The variance of the distribution

seed - The initial seed for the generator, two instances with the same seed will generate the same sequence of numbers

Method Details

sample

public double sample()

Generate a new random number.

Specified by:

sample in interface ContinuousGenerator

Returns:

The next random number in the sequence