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st: RE: [programming] using -if- in do file


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: [programming] using -if- in do file
Date   Thu, 12 Dec 2002 15:57:22 -0000

FEIVESON, ALAN
>
> Hello - Is there a way to restrict observations over which a do-file
> operates without using the -syntax- command? The syntax
> command allows [if]
> and [in] options, but is extremely picky about using
> numbers or non existent
> variable names in the argument list. Therefore I'd rather
> check for the -if-
> condition directly. I assume there must be some system
> macro which stores
> the -if- or -in- condition. How can I get it without using
> -syntax- ?
>

In addition to Nick Winter's comment,
a short answer is that -- with a .do
file -- you can't do this easily
and you're better not trying to do
it at all.

With an .ado file, -syntax- really is
the best way.

Nick
n.j.cox@durham.ac.uk

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