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

["Martin Weiss" <martin.weiss1@gmx.de>]

<>

"capture confirm weight" should be "capture confirm variable weight"


HTH
Martin
_______________________
----- Original Message ----- 
From: "Martin Weiss" <martin.weiss1@gmx.de>
To: <statalist@hsphsun2.harvard.edu>
Sent: Thursday, March 12, 2009 11:22 PM
Subject: st: Re: How can I check that a variable exists?


> <>
>
> ******
> sysuse auto, clear
>
> capture confirm variable weight
> if !_rc {
>                        di in red "weight exists"
>                }
>                else {
>                        di in red "weight does not exist"
>                }
>
>
> drop weight
>
> capture confirm weight
> if !_rc {
>                        di in red "weight exists"
>                }
>                else {
>                        di in red "weight does not exist"
>                }
> ******
>
> HTH
> Martin
> _______________________
> ----- Original Message ----- 
> From: "Benjamin Villena Roldan" <bvillena@troi.cc.rochester.edu>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Thursday, March 12, 2009 11:16 PM
> Subject: st: How can I check that a variable exists?
>
>
> > 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
> >
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/help.cgi?search
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/