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st: Re: manage list of variables


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   stata list <statalist@hsphsun2.harvard.edu>
Subject   st: Re: manage list of variables
Date   Thu, 12 Nov 2009 21:30:23 +0000 (GMT)

--- joachim jarreau wrote:
> Id like to know if there exists a way to create
> a local list of the existing variables in a dataset,
> In other words id need to do something like :
> collapse (sum) value, by( "all variables except this-that").


you can get a list of variables using the -ds- command, see: 
-help ds- and Martin Weiss (2008) Stata tip 66: ds—A hidden 
gem. The Stata Journal, 8(3):448-448. 
http://www.stata-journal.com/article.html?article=dm0040 .

You can remove a set of variables from that list using extended 
macro functions, see -help macrolists- and the example below:

*-------- begin example -------------
local except "make"
sysuse auto, clear
ds 
local varlist `r(varlist)'
local newlist: list varlist - except
di "`newlist'"
*----------- end example ------------

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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