Package cern.jet.random
Class Hyperbolic
- java.lang.Object
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- cern.colt.PersistentObject
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- cern.jet.random.AbstractDistribution
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- cern.jet.random.AbstractContinousDistribution
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- cern.jet.random.Hyperbolic
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- All Implemented Interfaces:
DoubleFunction
,IntFunction
,java.io.Serializable
,java.lang.Cloneable
public class Hyperbolic extends AbstractContinousDistribution
Hyperbolic distribution.Valid parameter ranges: alpha > 0 and beta > 0.
Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.
- Static methods operate on a default uniform random number generator; they are synchronized.
Implementation:
- Method: Non-Universal Rejection. High performance implementation.
- This is a port of hyplc.c from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based upon
L. Devroye (1986): Non-Uniform Random Variate Generation, Springer Verlag, New York.
- Version:
- 1.0, 09/24/99
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected double
a_setup
protected double
alpha
protected double
b_setup
protected double
beta
protected double
e
protected double
hl
protected double
hr
protected double
mmb_1
protected double
mpa_1
protected double
pm
protected double
pmr
protected double
pr
protected double
s
protected double
samb
protected static Hyperbolic
shared
protected double
u
protected double
v
protected double
x
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Fields inherited from class cern.jet.random.AbstractDistribution
randomGenerator
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Fields inherited from class cern.colt.PersistentObject
serialVersionUID
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Constructor Summary
Constructors Constructor Description Hyperbolic(double alpha, double beta, RandomEngine randomGenerator)
Constructs a Beta distribution.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description double
nextDouble()
Returns a random number from the distribution.double
nextDouble(double alpha, double beta)
Returns a hyperbolic distributed random number; bypasses the internal state.void
setState(double alpha, double beta)
Sets the parameters.static double
staticNextDouble(double alpha, double beta)
Returns a random number from the distribution.java.lang.String
toString()
Returns a String representation of the receiver.private static void
xstaticSetRandomGenerator(RandomEngine randomGenerator)
Sets the uniform random number generated shared by all static methods.-
Methods inherited from class cern.jet.random.AbstractDistribution
apply, apply, clone, getRandomGenerator, makeDefaultGenerator, nextInt, setRandomGenerator
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Field Detail
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alpha
protected double alpha
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beta
protected double beta
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a_setup
protected double a_setup
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b_setup
protected double b_setup
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x
protected double x
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u
protected double u
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v
protected double v
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e
protected double e
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hr
protected double hr
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hl
protected double hl
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s
protected double s
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pm
protected double pm
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pr
protected double pr
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samb
protected double samb
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pmr
protected double pmr
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mpa_1
protected double mpa_1
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mmb_1
protected double mmb_1
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shared
protected static Hyperbolic shared
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Constructor Detail
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Hyperbolic
public Hyperbolic(double alpha, double beta, RandomEngine randomGenerator)
Constructs a Beta distribution.
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Method Detail
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nextDouble
public double nextDouble()
Returns a random number from the distribution.- Specified by:
nextDouble
in classAbstractDistribution
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nextDouble
public double nextDouble(double alpha, double beta)
Returns a hyperbolic distributed random number; bypasses the internal state.
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setState
public void setState(double alpha, double beta)
Sets the parameters.
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staticNextDouble
public static double staticNextDouble(double alpha, double beta)
Returns a random number from the distribution.
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toString
public java.lang.String toString()
Returns a String representation of the receiver.- Overrides:
toString
in classjava.lang.Object
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xstaticSetRandomGenerator
private static void xstaticSetRandomGenerator(RandomEngine randomGenerator)
Sets the uniform random number generated shared by all static methods.- Parameters:
randomGenerator
- the new uniform random number generator to be shared.
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