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st: foreach and levels of string variable


From   "paul o'brien" <paul.obrien@afe2.org.uk>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: foreach and levels of string variable
Date   Mon, 27 Sep 2010 22:03:00 +0100

thanks martin and neil with the advice on adding quotes. however, i
still get the same error:

. levelsof study, local(levelstud)
`"Ashok 2002"' `"Creinin 2006"' `"Ellertson 2003"' `"Fine 2010"'
`"Glasier 2010"' `"Hamoda 2004"' `"Ho&Kwan 1993"' `"WHO 19
> 98"' `"von Hertzen 2002"'

. 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.

paul

On 27 September 2010 11:42, Maarten buis <maartenbuis@yahoo.co.uk> wrote:
>
> --- On Mon, 27/9/10, Paul O'Brien wrote:
> > . levelsof study, local(levelstud)
> >
> > . foreach l of local levelstud {
> >   2. ptrend p1 np1 day if study == `l'
> >   3. }
> > Ashok not found
> > r(111);
> >
> > where am i going wrong?
>
> ptrend p1 np1 day if study == `l'
>
> should be
>
> ptrend p1 np1 day if study == "`l'"
>
> 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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