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MathGroup Archive 1995

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

  • To: mathgroup at
  • Subject: [mg1082] Re: Random[BinomialDistribution[..]] wrong ?
  • From: Gennady <stupakov at>
  • Date: Sun, 14 May 1995 19:41:26 -0400
  • Organization: SLAC

In article <3opku3$7h4 at> Paul A. Rubin,
rubin at writes:
>In article <3olugl$ql4 at>,
>   bzbkowal at ZIB-Berlin.DE (Axel Kowald) wrote:
>->I'm using Mathematica 2.2 on a Macintosh and I got a problem
>->distributed random numbers.
>->I have:
>->Out-> {998486, 998486, 998486, 998486, 998486}
>->Not only that the random numbers are all the same, most importantly
>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
>->PDF[BinomialDistribution[10^6,0.01],n] works okay (but takes a long 
>->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
>be a bug in the Mac kernel.

I got the same result:

{9996, 9954, 9854, 10107, 9837}

on my PowerMAC with Mathematica version 2.2.2. 

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