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Re: st: excluding variables by type


From   "Eva Poen" <eva.poen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: excluding variables by type
Date   Tue, 25 Mar 2008 16:32:40 +0000

Libby,

here are two ways to do it.

1.
qui ds *
foreach x of varlist `=r(varlist)' {
   capture confirm string variable `x'
   if !_rc {
      do string things
   }
   else {
      do numeric things
   }
}

2.
qui ds *, has(type string)
foreach x of varlist `=r(varlist)' {
   do string things
}

qui ds *, has(type numeric)
foreach x of varlist `=r(varlist)' {
   do numeric things
}


Eva

2008/3/25, Libby Hemphill <libbyh@umich.edu>:
> Hi,
>
>  I'm wondering if there's a way to loop through all my variables and
>  perform some action only on those that are numeric.  Is there a way to
>  check for the type of the variable before doing something?  Like
>
>  for each variable
>  if string, next
>  else do X
>  end for
>
>  Thanks!
>
>  --
>  Libby Hemphill
>  Doctoral Candidate
>  School of Information
>  University of Michigan
>  http://www.libbyh.com
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