Do you only need integer values for the one parameter? If so, there is a half page, 7 step, algorithm in my old copy of Fishman's simulation text I can photocopy for you. He has two other algorithm that require more complex computations such as Cauchy and Gamma and Poisson variates.
-- (B=) <-----my sig Brian Schott ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
