Re: st: How can I check that a variable exists?

[Kyle Hood <kyle.hood@yale.edu>]

The command

. qui cap d xa

Sets _rc to 0 if xa exists, and 111 if not.  Thus,

. qui cap d xa
. if _rc == 0 {
. a // this is my action
. }

Kyle Hood
Department of Economics
Yale University

On Mar 12, 2009, at 3:16 PM, "Benjamin Villena Roldan" <bvillena@troi.cc.rochester.edu 
> wrote:

> Dear statalist,
> This may sound like a trivial question, but I unsuccessfully looked  
> for an
> answer so far.
>  I need to perform certain action A if there is a variable XA  
> defined in
> the dta file, and an action B if there is a variable XB in the dta  
> file. How
> can I do so? Any ideas?
>
> Thanks
>
> Benjamin
>
>
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