This container class permits one to apply the baker’s transformation to the output of any RandomStream. More...

Inheritance diagram for umontreal.ssj.rng.BakerTransformedStream:

Public Member Functions
	BakerTransformedStream (RandomStream stream)
	Constructs a new baker transformed stream, using the random numbers from the base stream stream.
void	resetStartStream ()
	Reinitializes the stream to its initial state \(I_g\): \(C_g\) and \(B_g\) are set to \(I_g\).
void	resetStartSubstream ()
	Reinitializes the stream to the beginning of its current substream:
void	resetNextSubstream ()
	Reinitializes the stream to the beginning of its next substream:
String	toString ()
	Returns a string starting with "Baker transformation of " and finishing with the result of the call to the toString method of the generator.
double	nextDouble ()
	Returns the baker transformation of s.nextDouble() where s is the base stream.
int	nextInt (int i, int j)
	Generates a random integer in \(\{i,...,j\}\) via nextDouble (in which the baker transformation is applied).
void	nextArrayOfDouble (double[] u, int start, int n)
	Calls nextArrayOfDouble (u, start, n) for the base stream, then applies the baker transformation.
void	nextArrayOfInt (int i, int j, int[] u, int start, int n)
	Fills up the array by calling nextInt (i, j).

Detailed Description

This container class permits one to apply the baker’s transformation to the output of any RandomStream.

It transforms each \(u \in[0,1]\) into \(2u\) if \(u \le1/2\) and \(2(1-u)\) if \(u > 1/2\). The nextDouble method will return the result of this transformation and the other next... methods are affected accordingly. Any instance of this class contains a RandomStream called its base stream, used to generate its numbers and to which the transformation is applied. Any call to one of the next... methods of this class will modify the state of the base stream.

The baker transformation is often applied when the RandomStream is actually an iterator over a point set used for quasi-Monte Carlo integration (see the hups package).

Definition at line 44 of file BakerTransformedStream.java.

Constructor & Destructor Documentation

◆ BakerTransformedStream()

umontreal.ssj.rng.BakerTransformedStream.BakerTransformedStream ( RandomStream stream )

Constructs a new baker transformed stream, using the random numbers from the base stream stream.

Definition at line 53 of file BakerTransformedStream.java.

Member Function Documentation

◆ nextArrayOfDouble()

void umontreal.ssj.rng.BakerTransformedStream.nextArrayOfDouble	(	double[]	u,
		int	start,
		int	n )

Calls nextArrayOfDouble (u, start, n) for the base stream, then applies the baker transformation.

Parameters

u	the array in which the numbers will be stored
start	the first index of u to be used
n	the number of random numbers to put in u

Implements umontreal.ssj.rng.RandomStream.

Definition at line 105 of file BakerTransformedStream.java.

◆ nextArrayOfInt()

void umontreal.ssj.rng.BakerTransformedStream.nextArrayOfInt	(	int	i,
		int	j,
		int[]	u,
		int	start,
		int	n )

Fills up the array by calling nextInt (i, j).

Parameters

i	the smallest possible integer to put in u
j	the largest possible integer to put in u
u	the array in which the numbers will be stored
start	the first index of u to be used
n	the number of random numbers to put in u