SSJ
V. 1.2.5.

umontreal.iro.lecuyer.randvar
Class PascalConvolutionGen

java.lang.Object
  extended by umontreal.iro.lecuyer.randvar.RandomVariateGen
      extended by umontreal.iro.lecuyer.randvar.RandomVariateGenInt
          extended by umontreal.iro.lecuyer.randvar.NegativeBinomialGen
              extended by umontreal.iro.lecuyer.randvar.PascalConvolutionGen

public class PascalConvolutionGen
extends NegativeBinomialGen

Implements Pascal random variate generators by the convolution method. The method generates n geometric variates with probability p and adds them up.

The algorithm is slow if n is large. A local copy of the parameters n and p is maintained in this class.


Constructor Summary
PascalConvolutionGen(RandomStream s, PascalDist dist)
          Creates a new generator for the distribution dist, using stream s.
 
Method Summary
 int nextInt()
          Generates a random number (an integer) from the discrete distribution contained in this object.
static int nextInt(RandomStream s, int n, double p)
           
 
Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGenInt
nextArrayOfInt
 
Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGen
getDistribution, getStream, nextArrayOfDouble, nextDouble, setStream
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PascalConvolutionGen

public PascalConvolutionGen(RandomStream s,
                            PascalDist dist)
Creates a new generator for the distribution dist, using stream s.

Method Detail

nextInt

public int nextInt()
Description copied from class: RandomVariateGenInt
Generates a random number (an integer) from the discrete distribution contained in this object. By default, this method uses inversion by calling the inverseF method of the distribution object. Alternative generating methods are provided in subclasses.

Overrides:
nextInt in class NegativeBinomialGen
Returns:
the generated value

nextInt

public static int nextInt(RandomStream s,
                          int n,
                          double p)

SSJ
V. 1.2.5.

To submit a bug or ask questions, send an e-mail to Pierre L'Ecuyer.