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Re: st: Tokenize local varlist


From   Dani Tilley <tilleydani@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Tokenize local varlist
Date   Mon, 12 Jul 2010 21:32:20 -0700 (PDT)

Thanks so much for this clarification, Eric.



----- Original Message ----
From: Eric Booth <ebooth@ppri.tamu.edu>
To: "<statalist@hsphsun2.harvard.edu>" <statalist@hsphsun2.harvard.edu>
Sent: Mon, July 12, 2010 11:46:50 PM
Subject: Re: st: Tokenize local varlist

<>

Use -display- to check the contents of your locals.  Also, notice that local 
doesn't take a varlist, it takes an expression; so, local doesn't expand the 
varlist for your line  "local tvars prefix_*" :

*******!
sysuse auto, clear
rename mpg prefix_mpg
rename price prefix_price
rename weight prefix_weight
rename foreign prefix_foreign
*****
local tvars prefix_*
di "`tvars'"   //   doesn't work
*****
ds prefix_*
local tvars `r(varlist)'
di "`tvars'"
token `tvars'
di "`1'"
local regressand `1'
mac shift
local regressors `*'
di "`regressors'"
**
regress `regressand' `regressors'
di "`e(cmdline)'"
*******!

~ Eric
__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu
Office: +979.845.6754


On Jul 12, 2010, at 10:32 PM, Dani Tilley wrote:

> local tvars prefix_*
> token `tvars'
> local regressand `1'
> mac shift
> local regressors `*'
> 
> So I try to assign all the variables that begin with "prefix_" to local varlist 
>
> tvars, and then I tokenize tvars and attempt to assign the first variable to 
> local regressand and the rest to regressors. However, when I -browse `1'- after 
>
> tokenizing tvars I get all the variables beginning with prefix_ (i.e. all 
> tvars), and after I -ma s- and -browse `*'- I get all the variables in my data 

> set.




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