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Re: st: foreach and levels of string variable


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: foreach and levels of string variable
Date   Tue, 28 Sep 2010 07:56:49 +0000 (GMT)

--- On Mon, 27/9/10, paul o'brien wrote:
> however, i still get the same error:
> 
> . levelsof study, local(levelstud)
> 
> . foreach l of local levelstud {
>   2. ptrend p1 np1 day if study == "`l'"
>   3. }
> Ashok not found
> r(111);
> 
> removed " 2002" in "Ashok 2002" and others - same problem.

I tried to reproduce your error, but I can't. It just should
work. This is what I tried:

*------------ begin example -------------
drop _all
input str16 study
`"Ashok 2002"' 
`"Creinin 2006"' 
`"Ellertson 2003"' 
`"Fine 2010"'
`"Glasier 2010"' 
`"Hamoda 2004"' 
`"Ho&Kwan 1993"' 
`"WHO 1998"' 
`"von Hertzen 2002"'
end

levelsof study, local(levelstud)
foreach l of local levelstud {
	tab study if study == "`l'"
}
*-------------- end example --------------

Maybe you should contact Stata's tech support, as you can
sent them the data and your .do file. That way they can 
exactly see what is going on. See:
<http://www.stata.com/support/tech-support/>

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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