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java.lang.Objectumontreal.iro.lecuyer.randvar.RandomVariateGen
umontreal.iro.lecuyer.randvar.RandomVariateGenInt
umontreal.iro.lecuyer.randvar.NegativeBinomialGen
public class NegativeBinomialGen
This class implements random variate generators having the negative binomial distribution. Its mass function is
where Γ is the gamma function, γ > 0 and 0 <= p <= 1. No local copy of the parameters γ and p is maintained in this class. The (non-static) nextInt method simply calls inverseF on the distribution.
| Constructor Summary | |
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NegativeBinomialGen(RandomStream s,
NegativeBinomialDist dist)
Creates a new generator for the distribution dist, using stream s. |
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| Method Summary | |
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int |
nextInt()
Generates a random number (an integer) from the discrete distribution contained in this object. |
static int |
nextInt(RandomStream s,
double gam,
double p)
Generates a new variate from the negative binomial distribution, with parameters γ = gam and p = p, using stream s. |
| Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGenInt |
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getDistribution, nextArrayOfInt |
| Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGen |
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getStream, nextArrayOfDouble, nextDouble, setStream |
| Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public NegativeBinomialGen(RandomStream s,
NegativeBinomialDist dist)
| Method Detail |
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public int nextInt()
RandomVariateGenInt
nextInt in class RandomVariateGenInt
public static int nextInt(RandomStream s,
double gam,
double p)
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SSJ V. 2.0. |
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