many thanks Nick. I sorted out the problem.
In message <031173627889364697C50B3B266CBB8A101BAF@GEOGMAIL.geog.ad.dur.ac.uk>
[email protected] writes:
> My guess is that what you are getting what you
> ask for, but that it is not what you want.
>
> The difference between
>
> if <condition> <command>
>
> and
>
> <command> if <condition>
>
> is profound. For one documentation, see
> http://www.stata.com/support/faqs/lang/ifqualifier.html
>
> I am not clear what you want precisely. If you
> want to drop a variable if and only if all observations
> are missing, then
>
> . search dropmiss
>
> for a convenience command.
>
> Nick
> [email protected]
>
> Alejandro Delafuente
> >
> > Dear Nick, thanks for your advice. With some little
> > adjustments it worked out!
> > Also, taking advantage of your generosity let me ask you a
> > quick question: am
> > trying to drop some monthly variables in a time sequence
> > (from january 1961 to
> > dec 2001) with missings in them. My code looks as follows:
> > foreach var of varlist jan* feb* ... dec* {
> > if `var' ==. {
> > drop `var'
> > }
> > }
> > But for some reason it is not working. Can you tell why?
> > As always, many thanks.
> >
>
> *
> * For searches and help try:
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> * http://www.ats.ucla.edu/stat/stata/
>
--
Alejandro de la Fuente
QEH/Department of International Development
Oxford University
*
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