eduni.distributions
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.

Field Summary

protected double	mean
protected double	std_dev

Fields inherited from class eduni.distributions.Generator

distrib

Constructor Summary

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

double

sample() Generate a new random number.

Methods inherited from class eduni.distributions.Generator

getSeed, reseed, setSeed

Methods inherited from class java.lang.Object

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

Methods inherited from interface eduni.distributions.Seedable

getSeed, reseed, setSeed

Field Detail

mean

protected double mean

std_dev

protected double std_dev

Constructor Detail

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 : variance > 0

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 : variance > 0

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

Method Detail

sample

public double sample()

Generate a new random number.

Specified by:

sample in interface ContinuousGenerator

Returns:

The next random number in the sequence