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st: foreach and levels of string variable
From
"paul o'brien" <[email protected]>
To
statalist <[email protected]>
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 <[email protected]> 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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