ibis::discreteZipf Class Reference

Discrete Zipf distribution. More...

#include <twister.h>

Public Member Functions
	discreteZipf (ibis::uniformRandomNumber &ur, double a=2.0, unsigned long imax=ULONG_MAX)
unsigned long	next ()
unsigned long	operator() ()
	Return a discrete random number in the range of [0, imax].

Detailed Description

Discrete Zipf distribution.

The value returned follow the probability distribution (1+k)^(-a) where a >= 0, k >= 0. For a > 1, it uses the rejection-inversion algorithm of W. Hormann and G. Derflinger. For a between 0 and 1, it uses a simple rejection method.

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The documentation for this class was generated from the following file:

• twister.h