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SSJ V. labo. |
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java.lang.Objectumontreal.iro.lecuyer.hups.PointSet
umontreal.iro.lecuyer.hups.CycleBasedPointSet
umontreal.iro.lecuyer.hups.CycleBasedPointSetBase2
public abstract class CycleBasedPointSetBase2
Similar to CycleBasedPointSet, except that the successive
values in the cycles are stored as integers in the range
{0,..., 2k -1}, where
1 <= k <= 31.
The output values ui, j are obtained by dividing these integer
values by 2k. Point sets where the successive coordinates of each
point are obtained via linear recurrences modulo 2 (e.g., linear feedback
shift registers or Korobov-type polynomial lattice rules)
are naturally expressed in this form.
Storing the integers
2kui, j instead of the ui, j themselves
makes it easier to apply randomizations such as digital random shifts
in base 2, which are applied to the bits before transforming
the value to a real number ui, j. When a random digital shift is
performed, it applies a bitwise exclusive-or of all the points with a single
random point.
| Nested Class Summary | |
|---|---|
class |
CycleBasedPointSetBase2.CycleBasedPointSetBase2Iterator
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| Nested classes/interfaces inherited from class umontreal.iro.lecuyer.hups.CycleBasedPointSet |
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CycleBasedPointSet.CycleBasedPointSetIterator |
| Constructor Summary | |
|---|---|
CycleBasedPointSetBase2()
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| Method Summary | |
|---|---|
void |
addRandomShift(int d1,
int d2,
RandomStream stream)
Adds a random digital shift in base 2 to all the points of the point set, using stream stream to generate the random numbers, for coordinates d1 to d2 - 1. |
void |
clearRandomShift()
. |
String |
formatPoints()
. |
double |
getCoordinate(int i,
int j)
. |
PointSetIterator |
iterator()
. |
| Methods inherited from class umontreal.iro.lecuyer.hups.CycleBasedPointSet |
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getDimension, toString |
| Methods inherited from class umontreal.iro.lecuyer.hups.PointSet |
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addRandomShift, addRandomShift, addRandomShift, formatPoints, formatPoints, formatPoints, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsNumbered, formatPointsNumbered, getNumPoints, getStream, randomize, randomize, randomize, randomize, randomize, setStream, unrandomize |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
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public CycleBasedPointSetBase2()
| Method Detail |
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public double getCoordinate(int i,
int j)
PointSet
getCoordinate in class CycleBasedPointSetpublic PointSetIterator iterator()
PointSet
iterator in class CycleBasedPointSet
public void addRandomShift(int d1,
int d2,
RandomStream stream)
addRandomShift in class CycleBasedPointSetstream - Stream used to generate random numberspublic void clearRandomShift()
PointSet
clearRandomShift in class CycleBasedPointSetpublic String formatPoints()
PointSet
formatPoints in class CycleBasedPointSet
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SSJ V. labo. |
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