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Re: st: Variables loop and deletion under certain conditions


From   Eric Booth <ebooth@ppri.tamu.edu>
To   "<statalist@hsphsun2.harvard.edu>" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Variables loop and deletion under certain conditions
Date   Thu, 12 May 2011 17:32:15 +0000

<>

Chris could also use -ds- to filter his varlist to string variables only if that is a concern -- but that wasn't a part of the question.
Further, Daniel's example has an error - it should read:

*****
foreach varname of varlist v* {
       cap conf str v `varname'    //fixed
       if _rc continue
	if `varname'[5]=="#ERROR" drop `varname'
}
*********
- Eric

__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu

On May 12, 2011, at 12:17 PM, daniel klein wrote:

> Eric already answerd the "why" it does not work. The solution proposed
> by Chris should work. Erics solution (although it is more an example)
> can be modified, because it will fail if the loop contains numeric
> variables. I do not know whether skipping numeric variables will
> additionally saves some execution time.
> 
> ---code revised---
> foreach varname of varlist v*{
>        cap conf str v `v'
>        if _rc continue
> 	if `varname'[5]=="#ERROR" drop `varname'
> }
> ---end---
> 
> Best
> Daniel
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