Class AhrensDieterMarsagliaTsangGammaSampler.BaseGammaSampler
- java.lang.Object
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- org.apache.commons.rng.sampling.distribution.AhrensDieterMarsagliaTsangGammaSampler.BaseGammaSampler
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- All Implemented Interfaces:
ContinuousSampler
,SharedStateContinuousSampler
,SharedStateSampler<SharedStateContinuousSampler>
- Direct Known Subclasses:
AhrensDieterMarsagliaTsangGammaSampler.AhrensDieterGammaSampler
,AhrensDieterMarsagliaTsangGammaSampler.MarsagliaTsangGammaSampler
- Enclosing class:
- AhrensDieterMarsagliaTsangGammaSampler
private abstract static class AhrensDieterMarsagliaTsangGammaSampler.BaseGammaSampler extends java.lang.Object implements SharedStateContinuousSampler
Base class for a sampler from the Gamma distribution.
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Field Summary
Fields Modifier and Type Field Description protected double
alpha
The alpha parameter.protected UniformRandomProvider
rng
Underlying source of randomness.protected double
theta
The theta parameter.
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Constructor Summary
Constructors Modifier Constructor Description private
BaseGammaSampler(double alpha, double theta, UniformRandomProvider rng)
(package private)
BaseGammaSampler(UniformRandomProvider rng, double alpha, double theta)
(package private)
BaseGammaSampler(UniformRandomProvider rng, AhrensDieterMarsagliaTsangGammaSampler.BaseGammaSampler source)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
toString()
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.apache.commons.rng.sampling.distribution.ContinuousSampler
sample, samples, samples
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Methods inherited from interface org.apache.commons.rng.sampling.SharedStateSampler
withUniformRandomProvider
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Field Detail
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rng
protected final UniformRandomProvider rng
Underlying source of randomness.
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alpha
protected final double alpha
The alpha parameter. This is a shape parameter.
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theta
protected final double theta
The theta parameter. This is a scale parameter.
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Constructor Detail
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BaseGammaSampler
BaseGammaSampler(UniformRandomProvider rng, double alpha, double theta)
- Parameters:
rng
- Generator of uniformly distributed random numbers.alpha
- Alpha parameter of the distribution.theta
- Theta parameter of the distribution.- Throws:
java.lang.IllegalArgumentException
- ifalpha <= 0
ortheta <= 0
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BaseGammaSampler
private BaseGammaSampler(double alpha, double theta, UniformRandomProvider rng)
- Parameters:
alpha
- Alpha parameter of the distribution.theta
- Theta parameter of the distribution.rng
- Generator of uniformly distributed random numbers.
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BaseGammaSampler
BaseGammaSampler(UniformRandomProvider rng, AhrensDieterMarsagliaTsangGammaSampler.BaseGammaSampler source)
- Parameters:
rng
- Generator of uniformly distributed random numbers.source
- Source to copy.
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