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st: R: how to cancel the seed set previously?


From   "Carlo Lazzaro" <carlo.lazzaro@tiscalinet.it>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: R: how to cancel the seed set previously?
Date   Thu, 2 Jul 2009 12:33:58 +0200

Dear Rose,
just to top off Maarten's and Martin's superb advices on this topic, you can
find some stuff on pseudo-random number generating idea in:

 - Juul S. An Introduction to Stata for Health Researchers. College Station:
Stata Press, 2006: 257;

- Davidson R, MacKinnon JG. Econometric Theory and Methods. Oxford:Oxford
University Press, 2004: 18; 157-159.

Kind Regards,
Carlo
-----Messaggio originale-----
Da: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Per conto di gjhxmu@sina.com
Inviato: giovedì 2 luglio 2009 9.56
A: statalist
Oggetto: st: how to cancel the seed set previously?

I set seed # before the runiform() function.
For instance,
I typed,
set seed 100
g x=runinform()

my confusions are,
1.how to set the seed number propriately? I saw everyone set it large.Any
difference?
2. how to cancel the seed set previously? Maybe next time I again want to
produce uniformly distributed random variates, and set seed 100 by accident
, which may lead to the variates produced is not random.

Thank you for any replies!

Sincerely,
from Rose.

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