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Re: st: RE: Detect use of svy: prefix
From
Richard Williams <[email protected]>
To
[email protected], <[email protected]>
Subject
Re: st: RE: Detect use of svy: prefix
Date
Wed, 25 May 2011 17:04:28 -0500
At 11:25 AM 5/25/2011, David Radwin wrote:
It seems to be the case that e(prefix) will include the value "svy" after
running a svy: command. So you could try something like this
. if strpos("`e(prefix)'","svy")==0 error
adding an error number if you care to.
David, I tweaked your idea a bit:
if strpos("`0'","[iw=_")!=0 error 198
Why? As far as I can tell, if svy: has been used, the command line
will include "[iw=_" At least I hope so. :) I should try it out a few
thousand times to be sure though. Assuming I am right, I can further
tweak the code to distinguish between when svy is ok to use and when
it isn't. Still not a perfect solution though, because even if I am
right, Stata could zap me by making changes in the svy prefix, e.g.
using "iweight" instead of "iw" .
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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