 | Leapfrog |
Class LeapfrogRandomStreams creates several independent streams of random numbers using
the method know as leapfrogging.
Inheritance HierarchySystemObject
CenterSpace.NMath.CoreIndependentRandomStreams
CenterSpace.NMath.CoreLeapfrogRandomStreams
CenterSpace.NMath.CoreIndependentRandomStreams
CenterSpace.NMath.CoreLeapfrogRandomStreams
Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4
SyntaxThe LeapfrogRandomStreams type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | LeapfrogRandomStreams(LeapfrogRandomStreams) | Creates a LeapfrogRandomStreams object which is a deep, independent copy. |
| LeapfrogRandomStreams(RandomNumberStreamBasicRandGenType, Int32, Int32) | Creates a LeapfrogRandomStreams object from the given parameters. |
| LeapfrogRandomStreams(Int32, RandomNumberStreamBasicRandGenType, Int32, Int32) | Creates a LeapfrogRandomStreams object from the given parameters. |
Properties| Name | Description | |
|---|---|---|
 | NumberOfStreams |
Gets the number of independent streams.
(Inherited from IndependentRandomStreams) |
| StreamLength |
The length of the independent streams.
(Inherited from IndependentRandomStreams) |
Methods| Name | Description | |
|---|---|---|
| Clone |
Creates a deep, independent copy of self.
(Overrides IndependentRandomStreamsClone) |
| Dispose |
Frees the stream data structure.
(Inherited from IndependentRandomStreams) |
 | Dispose(Boolean) |
Frees the stream data structure.
(Inherited from IndependentRandomStreams) |
| Fill(IRandomNumberDistributionDouble, DoubleMatrix) |
Fills the columns of a given matrix with independent random streams following
the given probablility distribution.
(Inherited from IndependentRandomStreams) |
| Fill(IRandomNumberDistributionDouble, DoubleMatrix) |
Fills the columns of a given matrix with independent random streams following
the given probablility distributions.
(Inherited from IndependentRandomStreams) |
| Fill(IRandomNumberDistributionSingle, FloatMatrix) |
Fills the columns of a given matrix with independent random streams following
the given probablility distribution.
(Inherited from IndependentRandomStreams) |
| Fill(IRandomNumberDistributionSingle, FloatMatrix) |
Fills the columns of a given matrix with independent random streams following
the given probablility distributions.
(Inherited from IndependentRandomStreams) |
| FillT(IRandomNumberDistributionT, T) |
Fills an array of independent random number streams with random deiviats
which follow the given probability distribution.
(Inherited from IndependentRandomStreams) |
| FillT(IRandomNumberDistributionT, T) |
Fills an array of independent random number streams with each stream following
a given probability distribution.
(Inherited from IndependentRandomStreams) |
| Finalize |
Frees the stream data structure.
(Inherited from IndependentRandomStreams) |
| Next(IRandomNumberDistributionDouble) |
Creates a matrix whose columns contain independent random number streams
following the given probablility distibution.
(Inherited from IndependentRandomStreams) |
| Next(IRandomNumberDistributionDouble) |
Creates a matrix whose columns contain independent random number streams
where each stream follows a specified probablility distibution.
(Inherited from IndependentRandomStreams) |
| Next(IRandomNumberDistributionSingle) |
Creates a matrix whose columns contain independent random number streams
following the given probablility distibution.
(Inherited from IndependentRandomStreams) |
| Next(IRandomNumberDistributionSingle) |
Creates a matrix whose columns contain independent random number streams
where each stream follows a specified probablility distibution.
(Inherited from IndependentRandomStreams) |
| NextT(IRandomNumberDistributionT) |
Returns an array of independent random number streams with the given
distribution.
(Inherited from IndependentRandomStreams) |
| NextT(IRandomNumberDistributionT) |
Returns an array of random number streams, each with a
a different specified distribution.
(Inherited from IndependentRandomStreams) |
Fields| Name | Description | |
|---|---|---|
 | disposed_ |
Flag indicating if the object is disposed.
(Inherited from IndependentRandomStreams) |
| streams_ |
Independent stream objects.
(Inherited from IndependentRandomStreams) |
Remarks
The independent sequences are created by splitting the original sequence
into k disjoint subsets, where k is the number of independent
streams, is such a way that the first stream would generate
the random numbers x1, xk+1, x2k+1, x3k+1,..., the second stream
would generate the numbers x2, xk+2, x2k+2, x3k+2,..., and, finally,
the kth stream would generate xk, x2k, x3k...
Leapfrog streams are only supported for basic random number
generator types which provide a more efficient algorithm than generation
of that full sequence to pick out a required subsequence. The static variable
LeapfrogStream.SupportedGeneratorTypes contains a list of the supported
types, which currently include:
RandomNumberStream.BasicRandGenType.MultiplicativeCongruent31,
RandomNumberStream.BasicRandGenType.MultipleCongruential59,
RandomNumberStream.BasicRandGenType.WinchannHillCombined.
RandomNumberStream.BasicRandGenType.MultiplicativeCongruent31,
RandomNumberStream.BasicRandGenType.MultipleCongruential59,
RandomNumberStream.BasicRandGenType.WinchannHillCombined.
See Also