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st: RE: seed command with rndbin


From   "Steichen, Thomas" <STEICHT@rjrt.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: seed command with rndbin
Date   Tue, 12 Aug 2003 10:32:31 -0400

Gwen Allardice writes:

> I have recently found a problem in  stata v7 . I have been 
> using the rndbin program extensively in some simulations I am running.
> 
> I would like to be able to replicate  my results and find 
> that the seed command does not seem to work; I keep getting 
> different results.
> 
> e.g. a simple example should illustrate my problem. the 
> following three lines of stata will generate and show me an 
> appropriate random number but repeating the three commands 
> then gives me a different number. I want it to give me the 
> same number. 
> 
> set seed 2
> rndbin 1 0.33  6
> display   xb
> 
> Can someone show me how to run the rndin command more than 
> once and get the same result each time. 


This apparently has something to with the fact that -rndbin- is
a Stata version 3.1 program.  If you change the version # within
-rndbin- to 5 then the -set seed #- is honored (and the program
seems to still work correctly). 

Someone from StataCorp will need to explain why this behaves the 
way it does under version 3.1; my memory is not good enough to
know how -set seed- and random numbers worked back then!

Tom

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