Class MarsagliaTsangWangDiscreteSampler.Poisson
- java.lang.Object
-
- org.apache.commons.rng.sampling.distribution.MarsagliaTsangWangDiscreteSampler.Poisson
-
- Enclosing class:
- MarsagliaTsangWangDiscreteSampler
public static final class MarsagliaTsangWangDiscreteSampler.Poisson extends Object
Create a sampler for the Poisson distribution.
-
-
Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static SharedStateDiscreteSampler
of(UniformRandomProvider rng, double mean)
Creates a sampler for the Poisson distribution.
-
-
-
Method Detail
-
of
public static SharedStateDiscreteSampler of(UniformRandomProvider rng, double mean)
Creates a sampler for the Poisson distribution.Any probability less than 2-31 will not be observed in samples.
Storage requirements depend on the tabulated probability values. Example storage requirements are listed below.
mean table size kB 0.25 882 0.88 0.5 1135 1.14 1 1200 1.20 2 1451 1.45 4 1955 1.96 8 2961 2.96 16 4410 4.41 32 6115 6.11 64 8499 8.50 128 11528 11.53 256 15935 31.87 512 20912 41.82 1024 30614 61.23
Note: Storage changes to 2 bytes per index between
mean=128
andmean=256
.- Parameters:
rng
- Generator of uniformly distributed random numbers.mean
- Mean.- Returns:
- Sampler.
- Throws:
IllegalArgumentException
- ifmean <= 0
ormean > 1024
.
-
-