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RE: st: Deleting Characters of a Var Name by index Number


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Deleting Characters of a Var Name by index Number
Date   Thu, 1 May 2008 21:17:53 +0100

Me too. What rule maps X42 to X5? 

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Philipp Rehm
Sent: 01 May 2008 21:11
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Deleting Characters of a Var Name by index Number

Do you have something like this in mind?

foreach var of varlist X31 X42 X53{
    rename `var' `=substr("`var'",1,2)'
}

I am slightly confused since I think that your two wishes:

(1) [X and only the second to last character from the *left* of `var'];
(2) X31 would then be renamed X1 and X42 would be X5 and so on;

don't match.

HTH,
Philipp

Kyle Caswell wrote:
> Hello.
> 
> I would like to write a macro that renames variables by deleting a 
> specific character of a variable name for a group of variables.
> 
> For example, suppose that I have variables X31 X42 X53 and so on.   I 
> would like to wite a macro that does something like the following:
> 
> foreach var of varlist X31 X42 X53{
>    rename `var' = [X and only the second to last character from the 
> *left* of `var']
> }
> 
> That is, X31 would then be renamed X1 and X42 would be X5 and so on.
> 

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