Class UnitBallSampler.UnitBallSampler3D

java.lang.Object

org.apache.commons.rng.sampling.shape.UnitBallSampler

org.apache.commons.rng.sampling.shape.UnitBallSampler.UnitBallSampler3D

All Implemented Interfaces:

ObjectSampler<double[]>, SharedStateObjectSampler<double[]>, SharedStateSampler<SharedStateObjectSampler<double[]>>

Enclosing class:

UnitBallSampler

private static final class UnitBallSampler.UnitBallSampler3D
extends UnitBallSampler

Sample uniformly from a 3D unit ball. This is an non-array based specialisation of UnitBallSampler.UnitBallSamplerND for performance.

Since:

1.4

Field Summary

Fields

Modifier and Type	Field	Description
private final ContinuousSampler	exp	The exponential distribution (mean=1).
private final NormalizedGaussianSampler	normal	The standard normal distribution.

Constructor Summary

Constructors

Constructor	Description
UnitBallSampler3D(UniformRandomProvider rng)

Method Summary

Modifier and Type	Method	Description
double[]	sample()	Create an object sample.
UnitBallSampler	withUniformRandomProvider(UniformRandomProvider rng)	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 UnitBallSampler

of

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ObjectSampler

samples, samples

Field Details

normal

private final NormalizedGaussianSampler normal

The standard normal distribution.

exp

private final ContinuousSampler exp

The exponential distribution (mean=1).

Constructor Details

UnitBallSampler3D

UnitBallSampler3D(UniformRandomProvider rng)

Parameters:

rng - Source of randomness.

Method Details

sample

public double[] sample()

Description copied from interface: ObjectSampler

Create an object sample.

Specified by:

sample in interface ObjectSampler<double[]>

Specified by:

sample in class UnitBallSampler

Returns:

a random Cartesian coordinate within the unit n-ball.

withUniformRandomProvider

public UnitBallSampler withUniformRandomProvider(UniformRandomProvider rng)

Description copied from class: UnitBallSampler

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 interface SharedStateSampler<SharedStateObjectSampler<double[]>>

Specified by:

withUniformRandomProvider in class UnitBallSampler

Parameters:

rng - Generator of uniformly distributed random numbers.

Returns:

the sampler