Class DirichletSampler.SymmetricDirichletSampler
java.lang.Object
org.apache.commons.rng.sampling.distribution.DirichletSampler
org.apache.commons.rng.sampling.distribution.DirichletSampler.SymmetricDirichletSampler
- All Implemented Interfaces:
ObjectSampler<double[]>
,SharedStateObjectSampler<double[]>
,SharedStateSampler<SharedStateObjectSampler<double[]>>
- Enclosing class:
DirichletSampler
Sample from a symmetric Dirichlet distribution with the same concentration parameter
for each category.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final int
Number of categories.private final SharedStateContinuousSampler
Sampler for the categories. -
Constructor Summary
ConstructorsConstructorDescriptionSymmetricDirichletSampler
(UniformRandomProvider rng, int k, SharedStateContinuousSampler sampler) -
Method Summary
Modifier and TypeMethodDescriptionprotected int
getK()
Gets the number of categories.protected double
nextGamma
(int i) Create a gamma sample for the given category.Create a new instance of the sampler with the same underlying state using the given uniform random provider as the source of randomness.Methods inherited from class org.apache.commons.rng.sampling.distribution.DirichletSampler
of, sample, symmetric, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.commons.rng.sampling.ObjectSampler
samples, samples
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Field Details
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k
private final int kNumber of categories. -
sampler
Sampler for the categories.
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Constructor Details
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Method Details
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getK
protected int getK()Description copied from class:DirichletSampler
Gets the number of categories.- Specified by:
getK
in classDirichletSampler
- Returns:
- k
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nextGamma
protected double nextGamma(int i) Description copied from class:DirichletSampler
Create a gamma sample for the given category.- Specified by:
nextGamma
in classDirichletSampler
- Parameters:
i
- Category.- Returns:
- the sample
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withUniformRandomProvider
public DirichletSampler.SymmetricDirichletSampler withUniformRandomProvider(UniformRandomProvider rng) Description copied from class:DirichletSampler
Create a new instance of the sampler with the same underlying state using the given uniform random provider as the source of randomness.- Specified by:
withUniformRandomProvider
in interfaceSharedStateSampler<SharedStateObjectSampler<double[]>>
- Specified by:
withUniformRandomProvider
in classDirichletSampler
- Parameters:
rng
- Generator of uniformly distributed random numbers.- Returns:
- the sampler
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