umontreal.iro.lecuyer.hups

Class AntitheticPointSet

java.lang.Object

umontreal.iro.lecuyer.hups.PointSet

umontreal.iro.lecuyer.hups.ContainerPointSet

umontreal.iro.lecuyer.hups.AntitheticPointSet

public class AntitheticPointSet
extends ContainerPointSet

This container class provides antithetic points. That is, 1 - u_{i, j} is returned in place of coordinate u_{i, j}. To generate regular and antithetic variates with a point set p, e.g., for variance reduction, one can define an AntitheticPointSet object pa that contains p, and then generate the regular variates with p and the antithetic variates with pa.

Constructor Summary

Constructors

Constructor and Description
AntitheticPointSet(PointSet P) Constructs an antithetic point set from the given point set P.

Method Summary

Modifier and Type	Method and Description
double	getCoordinate(int i, int j) Returns ui, j, the coordinate j of the point i.
PointSetIterator	iterator() Constructs and returns a point set iterator.
java.lang.String	toString() Formats a string that contains information about the point set.

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

addRandomShift, addRandomShift, clearRandomShift, getDimension, getNumPoints, getOriginalPointSet, randomize

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

addRandomShift, addRandomShift, 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

AntitheticPointSet

public AntitheticPointSet(PointSet P)

Constructs an antithetic point set from the given point set P.

Parameters:

P - point set for which we want antithetic version

Method Detail

getCoordinate

public double getCoordinate(int i,
                            int j)

Description copied from class: PointSet

Returns u_{i, j}, the coordinate j of the point i.

Overrides:

getCoordinate in class ContainerPointSet

Parameters:

i - index of the point to look for

j - index of the coordinate to look for

Returns:

the value of u_{i, j}

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

toString

public java.lang.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