Package dev.nm.stat.random.rng.univariate.uniform.linear

Class CompositeLinearCongruentialGenerator

java.lang.Object

dev.nm.stat.random.rng.univariate.uniform.linear.CompositeLinearCongruentialGenerator

All Implemented Interfaces:

RandomLongGenerator, RandomNumberGenerator, LinearCongruentialGenerator, Seedable

public class CompositeLinearCongruentialGenerator
extends Object
implements LinearCongruentialGenerator

A composite generator combines a number of simple LinearCongruentialGenerator, such as Lehmer, to form one longer period generator by first summing values and then taking modulus. The resultant generator in general has a superior uniformity and a longer period, without overflowing the arithmetics.

Constructor Summary

Constructors

Constructor	Description
CompositeLinearCongruentialGenerator(LinearCongruentialGenerator[] rng)	Constructs a linear congruential generator from some simpler and shorter modulus generators.

Method Summary

Modifier and Type	Method	Description
long	modulus()	Get the modulus of this linear congruential generator.
double	nextDouble()	Get the next random double.
long	nextLong()	Get the next random long.
int	order()	Get the order of recursion.
void	seed(long... seeds)	Seed the random number/vector/scenario generator to produce repeatable experiments.

Methods inherited from class java.lang.Object

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

Constructor Details

CompositeLinearCongruentialGenerator

public CompositeLinearCongruentialGenerator(LinearCongruentialGenerator[] rng)

Constructs a linear congruential generator from some simpler and shorter modulus generators.

Parameters:

rng - simpler and shorter modulus linear congruential generators

Method Details

seed

public void seed(long... seeds)

Description copied from interface: Seedable

Seed the random number/vector/scenario generator to produce repeatable experiments.

Specified by:

seed in interface Seedable

Parameters:

seeds - the seeds

order

public int order()

Description copied from interface: LinearCongruentialGenerator

Get the order of recursion.

Specified by:

order in interface LinearCongruentialGenerator

Returns:

the order of recursion

modulus

public long modulus()

Description copied from interface: LinearCongruentialGenerator

Get the modulus of this linear congruential generator.

Specified by:

modulus in interface LinearCongruentialGenerator

Returns:

the modulus

nextLong

public long nextLong()

Description copied from interface: RandomLongGenerator

Get the next random long.

Specified by:

nextLong in interface RandomLongGenerator

Returns:

the next random long

nextDouble

public double nextDouble()

Description copied from interface: RandomNumberGenerator

Get the next random double.

Specified by:

nextDouble in interface RandomNumberGenerator

Returns:

the next random number