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Re: st: Rename problem: r(110) already defined


From   "Sergiy Radyakin" <serjradyakin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Rename problem: r(110) already defined
Date   Tue, 12 Feb 2008 18:01:02 -0500

Instead of capture rename ... use capture confirm variable.

 capture confirm variable `newname'

After that you can rename the variable if the new one does not exist.

Regards, Sergiy



On 2/12/08, Friedrich Huebler <fhuebler@gmail.com> wrote:
> I am trying to convert all variable names in my data to lowercase,
> using the commands below. The -rename- command returns error code 110
> "already defined" if a variable name is already lowercase.
>
> ds
> local vars "`r(varlist)'"
> foreach v of local vars {
>  local newname = lower("`v'")
>  rename `v' `newname'
> }
>
> The problem can be reproduced with the auto data.
>
> . sysuse auto
> . rename make make
> make already defined
> r(110);
>
> What is the rationale for disallowing -rename- in cases where there is
> no other variable by the same name? In theory, no two variables in my
> data have the same name, whether uppercase or lowercase. Can the
> commands above be modified without resorting to -capture-? I would
> like to avoid -capture rename- because if there are variables with the
> same name it indicates a problem with the data and execution of the
> do-file should stop at that point.
>
> Thanks,
>
> Friedrich
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