umontreal.iro.lecuyer.hups
Class RandShiftedPointSet

java.lang.Object
  umontreal.iro.lecuyer.hups.PointSet
      umontreal.iro.lecuyer.hups.ContainerPointSet
          umontreal.iro.lecuyer.hups.RandShiftedPointSet

public class RandShiftedPointSet
extends ContainerPointSet

This container class embodies a point set to which a random shift modulo 1 is applied (i.e., a single uniform random point is added to all points, modulo 1, to randomize the inner point set). When calling addRandomShift, a new random shift will be generated. This shift is represented by a vector of d uniforms over (0, 1), where d is the current dimension of the shift.

Constructor Summary

RandShiftedPointSet(PointSet P, int dimShift, RandomStream stream)
Constructs a structure to contain a randomly shifted version of P.

Method Summary

void	addRandomShift() Deprecated.
void	addRandomShift(int d1, int d2) Deprecated.
void	addRandomShift(int d1, int d2, RandomStream stream) Changes the stream used for the random shifts to stream, then refreshes the shift for coordinates d1 to d2-1.
void	addRandomShift(RandomStream stream) Changes the stream used for the random shifts to stream, then refreshes all coordinates of the random shift, up to its current dimension.
int	getShiftDimension() Returns the number of dimensions of the current random shift.
PointSetIterator	iterator() Constructs and returns a point set iterator.
String	toString() Formats a string that contains information about the point set.

Methods inherited from class umontreal.iro.lecuyer.hups.ContainerPointSet

clearRandomShift, getCoordinate, getDimension, getNumPoints, getOriginalPointSet, randomize

Methods inherited from class umontreal.iro.lecuyer.hups.PointSet

formatPoints, formatPoints, formatPoints, formatPoints, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsNumbered, formatPointsNumbered, getStream, randomize, randomize, randomize, randomize, setStream, unrandomize

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RandShiftedPointSet

public RandShiftedPointSet(PointSet P,
                           int dimShift,
                           RandomStream stream)

Constructs a structure to contain a randomly shifted version of P. The random shifts will be generated in up to dimShift dimensions, using stream stream.

Parameters:

P - point set being randomized

dimShift - dimension of the initial shift

stream - stream used for generating random shifts

Method Detail

getShiftDimension

public int getShiftDimension()

Returns the number of dimensions of the current random shift.

addRandomShift

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

Changes the stream used for the random shifts to stream, then refreshes the shift for coordinates d1 to d2-1.

Overrides:

addRandomShift in class ContainerPointSet

Parameters:

d1 - lower dimension of the random shift

d2 - upper dimension of the random shift

stream - the random stream

addRandomShift

public void addRandomShift(RandomStream stream)

Changes the stream used for the random shifts to stream, then refreshes all coordinates of the random shift, up to its current dimension.

Overrides:

addRandomShift in class ContainerPointSet

Parameters:

stream - the random stream

addRandomShift

@Deprecated
public void addRandomShift(int d1,
                                      int d2)

Deprecated.

Refreshes the random shift (generates new uniform values for the random shift coordinates) for coordinates d1 to d2-1.

Overrides:

addRandomShift in class PointSet

addRandomShift

@Deprecated
public void addRandomShift()

Deprecated.

Overrides:

addRandomShift in class PointSet

toString

public String toString()

Description copied from class: PointSet

Formats a string that contains information about the point set.

Overrides:

toString in class ContainerPointSet

Returns:

string representation of the point set information

iterator

public PointSetIterator iterator()

Description copied from class: PointSet

Constructs and returns a point set iterator. The default implementation returns an iterator that uses the method getCoordinate (i,j) to iterate over the points and coordinates, but subclasses can reimplement it for better efficiency.

Overrides:

iterator in class ContainerPointSet

Returns:

point set iterator for the point set