This class implements a digital net in base 2 starting from a linear feedback shift register generator. More...

Inheritance diagram for F2wNetLFSR:

Collaboration diagram for F2wNetLFSR:

Public Member Functions
	F2wNetLFSR (int w, int r, int modQ, int step, int nbcoeff, int coeff[], int nocoeff[], int dim)
	Constructs and stores the set of cycles for an LCG with modulus n and multiplier a. More...

	F2wNetLFSR (String filename, int no, int dim)
	Constructs a point set after reading its parameters from file `filename`; the parameters are located at line numbered `no` of `filename`. More...

String	toString ()

Public Member Functions inherited from DigitalNetBase2
void	printGeneratorMatrices (int s)
	Prints the generator matrices as bit matrices in standard form for dimensions 1 to \(s\). More...

void	printGeneratorMatricesTrans (int s)
	Prints the generator matrices transposed in the form of integers for dimensions 1 to \(s\). More...

double	getCoordinate (int i, int j)

double	getCoordinateNoGray (int i, int j)

PointSetIterator	iterator ()
	Returns a `DigitalNetBase2Iterator` which enumerates the points using a Gray code.

PointSetIterator	iteratorNoGray ()
	This iterator does not use the Gray code. More...

String	toString ()

void	clearRandomShift ()

void	addRandomShift (int d1, int d2, RandomStream stream)

void	addRandomShift (RandomStream stream)

void	leftMatrixScramble (RandomStream stream)

void	iBinomialMatrixScramble (RandomStream stream)

void	stripedMatrixScramble (RandomStream stream)

void	rightMatrixScramble (RandomStream stream)

void	nestedUniformScramble (RandomStream stream, double[][] output)
	Same as nestedUniformScramble(stream, output, 0) .

void	nestedUniformScramble (RandomStream stream, double[][] output, int numBits)
	Apply Owen's nested uniform scrambling. More...

void	leftMatrixScrambleDiag (RandomStream stream)

void	leftMatrixScrambleFaurePermut (RandomStream stream, int sb)

void	leftMatrixScrambleFaurePermutDiag (RandomStream stream, int sb)

void	leftMatrixScrambleFaurePermutAll (RandomStream stream, int sb)

void	iBinomialMatrixScrambleFaurePermut (RandomStream stream, int sb)

void	iBinomialMatrixScrambleFaurePermutDiag (RandomStream stream, int sb)

void	iBinomialMatrixScrambleFaurePermutAll (RandomStream stream, int sb)

void	stripedMatrixScrambleFaurePermutAll (RandomStream stream, int sb)

Public Member Functions inherited from DigitalNet
	DigitalNet ()
	Empty constructor.

double	getCoordinate (int i, int j)
	Returns \(u_{i',j}\), the coordinate \(j\) of point \(i'\), where \(i'\) is the Gray code for \(i\). More...

PointSetIterator	iterator ()

double	getCoordinateNoGray (int i, int j)
	Returns \(u_{i,j}\), the coordinate \(j\) of point \(i\), the points being enumerated in the standard order (no Gray code). More...

PointSetIterator	iteratorNoGray ()
	Returns an iterator that does not use the Gray code. More...

void	addRandomShift (int d1, int d2, RandomStream stream)
	Generates a random digital shift for coordinates \(j\) from `d1` to `d2-1`, using `stream` to generate the random numbers. More...

void	addRandomShift (RandomStream stream)
	Same as addRandomShift(0, dim, stream), where `dim` is the dimension of the digital net. More...

void	clearRandomShift ()
	Erases the current digital random shift, if any.

String	toString ()
	Formats a string that contains information on this digital net. More...

void	leftMatrixScramble (RandomStream stream)
	Applies a linear scramble by multiplying each \(\mathbf{C}_j\) on the left by a \(w\times w\) nonsingular lower-triangular matrix. More...

void	leftMatrixScrambleDiag (RandomStream stream)
	Similar to leftMatrixScramble except that all the off-diagonal elements of the \(\mathbf{M}_j\) are 0. More...

void	leftMatrixScrambleFaurePermut (RandomStream stream, int sb)
	Similar to leftMatrixScramble except that the diagonal elements of each matrix \(\mathbf{M}_j\) are chosen from a restricted set of the best integers as calculated by Faure [59] . More...

void	leftMatrixScrambleFaurePermutDiag (RandomStream stream, int sb)
	Similar to leftMatrixScrambleFaurePermut except that all off-diagonal elements are 0. More...

void	leftMatrixScrambleFaurePermutAll (RandomStream stream, int sb)
	Similar to leftMatrixScrambleFaurePermut except that the elements under the diagonal are also chosen from the same restricted set as the diagonal elements. More...

void	iBinomialMatrixScramble (RandomStream stream)
	Applies the \(i\)-binomial matrix scramble proposed by Tezuka. More...

void	iBinomialMatrixScrambleFaurePermut (RandomStream stream, int sb)
	Similar to iBinomialMatrixScramble except that the diagonal elements of each matrix \(\mathbf{M}_j\) are chosen as in leftMatrixScrambleFaurePermut. More...

void	iBinomialMatrixScrambleFaurePermutDiag (RandomStream stream, int sb)
	Similar to iBinomialMatrixScrambleFaurePermut except that all the off-diagonal elements are 0. More...

void	iBinomialMatrixScrambleFaurePermutAll (RandomStream stream, int sb)
	Similar to iBinomialMatrixScrambleFaurePermut except that the elements under the diagonal are also chosen from the same restricted set as the diagonal elements. More...

void	stripedMatrixScramble (RandomStream stream)
	Applies the striped matrix scramble proposed by Owen. More...

void	stripedMatrixScrambleFaurePermutAll (RandomStream stream, int sb)
	Similar to stripedMatrixScramble except that the elements on and under the diagonal of each matrix \(\mathbf{M}_j\) are chosen as in leftMatrixScrambleFaurePermut. More...

void	rightMatrixScramble (RandomStream stream)
	Applies a linear scramble by multiplying each \(\mathbf{C}_j\) on the right by a single \(k\times k\) nonsingular upper-triangular matrix \(\mathbf{M}\), as suggested by Faure and Tezuka. More...

void	unrandomize ()
	Restores the original generator matrices and removes the random shift.

void	resetGeneratorMatrices ()
	Restores the original generator matrices. More...

void	eraseOriginalGeneratorMatrices ()
	Erases the original generator matrices and replaces them by the current ones. More...

void	printGeneratorMatrices (int s)
	Prints the generator matrices in standard form for dimensions 1 to \(s\).

Public Member Functions inherited from PointSet
int	getDimension ()
	Returns the dimension (number of available coordinates) of the points. More...

int	getNumPoints ()
	Returns the number of points. More...

abstract double	getCoordinate (int i, int j)
	Returns \(u_{i,j}\), the coordinate \(j\) of the point \(i\). More...

PointSetIterator	iterator ()
	Constructs and returns a point set iterator. More...

void	randomize (PointSetRandomization rand)
	Randomizes this point set using the given `rand`. More...

void	addRandomShift (int d1, int d2, RandomStream stream)
	By default, this method generates a random shift in the protected `double[]` array `shift`, to be used eventually for a random shift modulo 1. More...

void	addRandomShift (RandomStream stream)
	Same as addRandomShift(0, dim, stream), where `dim` is the dimension of the point set. More...

void	addRandomShift (int d1, int d2)
	Refreshes the random shift (generates new uniform values for the random shift coordinates) for coordinates `d1` to `d2-1`, using the saved `shiftStream`.

void	addRandomShift ()
	Same as addRandomShift(0, dim), where `dim` is the dimension of the point set.

void	clearRandomShift ()
	Erases the current random shift, if any.

String	toString ()
	Formats a string that contains information about the point set. More...

String	formatPoints ()
	Same as invoking formatPoints(n, d) with \(n\) and \(d\) equal to the number of points and the dimension of this object, respectively. More...

String	formatPoints (int n, int d)
	Formats a string that displays the same information as returned by toString, together with the first \(d\) coordinates of the first \(n\) points. More...

String	formatPoints (PointSetIterator iter)
	Same as invoking formatPoints(iter, n, d) with \(n\) and \(d\) equal to the number of points and the dimension, respectively. More...

String	formatPoints (PointSetIterator iter, int n, int d)
	Same as invoking formatPoints(n, d), but prints the points by calling `iter` repeatedly. More...

String	formatPointsBase (int b)
	Similar to formatPoints(), but the points coordinates are printed in base \(b\). More...

String	formatPointsBase (int n, int d, int b)
	Similar to formatPoints(n, d), but the points coordinates are printed in base \(b\). More...

String	formatPointsBase (PointSetIterator iter, int b)
	Similar to formatPoints(iter), but the points coordinates are printed in base \(b\). More...

String	formatPointsBase (PointSetIterator iter, int n, int d, int b)
	Similar to formatPoints(iter, n, d), but the points coordinates are printed in base \(b\). More...

String	formatPointsNumbered ()
	Same as invoking formatPointsNumbered(n, d) with \(n\) and \(d\) equal to the number of points and the dimension, respectively. More...

String	formatPointsNumbered (int n, int d)
	Same as invoking formatPoints(n,d), except that the points are numbered. More...

Additional Inherited Members
Protected Member Functions inherited from DigitalNet
void	printMat (int N, int[][][] A, String name)

void	printMat0 (int[][] A, String name)

int	intToDigitsGray (int b, int i, int numDigits, int[] bary, int[] gray)

Protected Attributes inherited from DigitalNetBase2
int []	genMat

int []	digitalShift

Protected Attributes inherited from DigitalNet
int	b = 0

int	numCols = 0

int	numRows = 0

int	outDigits = 0

int [][]	genMat

int [][]	digitalShift

double	normFactor

double []	factor

Protected Attributes inherited from PointSet
double	EpsilonHalf = 1.0 / Num.TWOEXP[55]
	To avoid 0 for nextCoordinate when random shifting, we add this to each coordinate.

int	dim = 0
	Dimension of the points.

int	numPoints = 0
	Number of points.

int	dimShift = 0
	Current dimension of the shift. More...

int	capacityShift = 0
	Number of array elements in the shift vector, always >= dimShift.

double []	shift
	This is the shift vector as a `double[]` array, which contains the current random shift in case we apply a random shift modulo 1. More...

RandomStream	shiftStream
	Stream used to generate the random shifts. More...

Static Protected Attributes inherited from PointSet
static final int	MAXBITS = 31
	Since Java has no unsigned type, the 32nd bit cannot be used efficiently, so we have only 31 bits. More...

Detailed Description

This class implements a digital net in base 2 starting from a linear feedback shift register generator.

It is exactly the same point set as the one defined in the class umontreal.ssj.hups.F2wCycleBasedLFSR. See the description of this class for more details on the way the point set is constructed.

Constructing a point set using this class, instead of using umontreal.ssj.hups.F2wCycleBasedLFSR, makes SSJ construct a digital net in base 2. This is useful if one wants to randomize using one of the randomizations included in the class umontreal.ssj.hups.DigitalNet.

Constructor & Destructor Documentation

◆ F2wNetLFSR() [1/2]

F2wNetLFSR	(	int	w,
		int	r,
		int	modQ,
		int	step,
		int	nbcoeff,
		int	coeff[],
		int	nocoeff[],
		int	dim
	)

Constructs and stores the set of cycles for an LCG with modulus n and multiplier a.

If pgcd(a, n) = 1, this constructs a full-period LCG which has two cycles, one containing 0 and one, the LCG period.

Parameters

n	required number of points and modulo of the LCG
a	generator a of the LCG Constructs a point set with \(2^{rw}\) points. See the description of the class umontreal.ssj.hups.F2wStructure for the meaning of the parameters.

◆ F2wNetLFSR() [2/2]

F2wNetLFSR	(	String	filename,
		int	no,
		int	dim
	)

Constructs a point set after reading its parameters from file filename; the parameters are located at line numbered no of filename.

The available files are listed in the description of class umontreal.ssj.hups.F2wStructure.

The documentation for this class was generated from the following file:

F2wNetLFSR.java

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ F2wNetLFSR() [1/2]

◆ F2wNetLFSR() [2/2]