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Re: st: "bsample" and "set seed" together do not work!
From
Daniele Pacifico <[email protected]>
To
[email protected]
Subject
Re: st: "bsample" and "set seed" together do not work!
Date
Fri, 17 Sep 2010 14:15:13 +0000 (GMT)
Dear Maarten,
thanks for your help.
Well, I actually need to set the seed inside my program.. In your opinion, is
there a way to create a "temporary seed" within a ado file? I mean, something
like a temporary variable that disappears once the program ends?
Thanks again for your help,
Daniele
----- Original Message ----
From: Maarten buis <[email protected]>
To: [email protected]
Sent: Fri, 17 September, 2010 14:48:09
Subject: Re: st: "bsample" and "set seed" together do not work!
--- On Fri, 17/9/10, Daniele Pacifico wrote:
> I am working with the command "bsample" and I
> discovered that the command "set seed #" stops
> "bsample" from drawing different samples from
> my data.
>
> I had this problem because I am writing an ado file that
> sets a seed when it runs.. However, I discovered that the
> seed I define within my ado file creates the problem I
> have shown you above (i.e. I cannot use bsample with the
> command defined in my ado file).. Do you have any advise
> about it? How can I "unset" the seed so as to allow it to
> vary randomly again with bsample?
"Do not work" does not describe your situation very well: All
programs work exactly as they should, i.e. they do what you
told them to do (they may not do what you want them to do,
but that is a different question).
You might be tempted to set the seed "randomly" inside your
loop before each -bsample- command, but that does not work
well as Bill discussed here:
http://www.stata.com/statalist/archive/2010-08/msg00834.html
I just would avoid setting the seed inside a program. In
general it sounds like bad practice to me. For one thing
you are this way overwriting any -set seed- commands your
user might issue before your command, thus leaving them
puzzled e.g. when they are trying to run a simulation using
your command.
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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