Re: Random[BinomialDistribution[..]] wrong ?

*To*: mathgroup at christensen.cybernetics.net*Subject*: [mg1071] Re: Random[BinomialDistribution[..]] wrong ?*From*: rubin at msu.edu (Paul A. Rubin)*Date*: Fri, 12 May 1995 17:10:59 -0400*Organization*: Michigan State University

In article <3olugl$ql4 at news0.cybernetics.net>, bzbkowal at ZIB-Berlin.DE (Axel Kowald) wrote: ->I'm using Mathematica 2.2 on a Macintosh and I got a problem generating binomially ->distributed random numbers. -> ->I have: -> ->Needs["Statistics`DiscreteDistributions`"] ->SeedRandom[17] ->Table[Random[BinomialDistribution[10^6,0.01]],{5}] ->Out-> {998486, 998486, 998486, 998486, 998486} -> ->Not only that the random numbers are all the same, most importantly they are in a ->completely wrong range. One should get something around 10000 ! ->The problem seems to be 10^6, if I use something smaller, like 10000, everything works ->fine. Furthermore the problem seems to be in the Random[] function since ->PDF[BinomialDistribution[10^6,0.01],n] works okay (but takes a long time). -> ->Any comments, hints, solutions ? I pasted your input statements into version 2.2.2 for Windows and got something different (and a lot more reasonable): {9996, 9954, 9854, 10107, 9837} If another Mac user can reproduce the problem, then I would suspect it to be a bug in the Mac kernel. Paul ************************************************************************** * Paul A. Rubin Phone: (517) 432-3509 * * Department of Management Fax: (517) 432-1111 * * Eli Broad Graduate School of Management Net: RUBIN at MSU.EDU * * Michigan State University * * East Lansing, MI 48824-1122 (USA) * ************************************************************************** Mathematicians are like Frenchmen: whenever you say something to them, they translate it into their own language, and at once it is something entirely different. J. W. v. GOETHE