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st: RE: problem with a list returned by stata (r(varlist))


From   "Maarten Buis" <M.Buis@fsw.vu.nl>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: problem with a list returned by stata (r(varlist))
Date   Fri, 23 Feb 2007 13:58:27 +0100

--- Valérie Orozco wrote:
> What I want to do is to store lists (in a macro) of some variables in my
> data. I use the command "ds" to have them and I thought that thanks to the
> return list r(varlist) I would be able to play with this in my program
> (make some differences and others manipulations of macrolists)...but ir
> doesn't work...
>
> My example is the following :
> 
> ds Vol*      /*I want Stata to show me all the variables beginning by
> "Vol" in my data*/
> local liste1 `r(varlist)'   /*I put it in a local list*/
> di "`liste1'"          /*to test it : it woks*/
> local liste1bis `"`liste1'"' 
> di `liste1bis'         /*and it is a funny result*/

What is going on here has to do with the way -di- works. If you type 
-di varlist- it will diplay the values of the first observations of the 
variables in varlist. The local `list1bis' contains a string with 
variable names separated by spaces (a list). If you type 
-di variable list. So, if you type: -di `listbis'- Stata sees 
-di varlist- and it displays the first observations of each variable 
in the varlist. To see the names of the variables in `list1bis' type: 
-di "`list1bis'".

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434 

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------



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