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st: Re: creating a varlist


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: creating a varlist
Date   Wed, 22 Oct 2008 20:51:49 +0200

see http://www.stata.com/statalist/archive/2008-05/msg00629.html

HTH
Martin _______________________ ----- Original Message ----- From: "Radu Ban" <raduban@gmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, October 22, 2008 8:39 PM
Subject: st: creating a varlist


Dear Statalist,

I want to generate a variable with the -egen anycount- command.

let's say:

egen ttt = anycount(`vlist'), v(1)

The varlist in the argument is long and the variables have some
regularity in their names. They all of the form qX3_1 qX3_2, where X
goes from 5 to 46. Note that there are other variables with X between
1 and 4 which I do not want, so that a varlist q*3_1 q*3_2 does not
work. To create my variables list I did the following:

local vlist ""
forvalues n = 5/46 {
local vlist = "`vlist' q`n'3_1 q`n'3_2"
}
*then to check
di "`vlist'"

However, the display command shows that the macro stops at q23. Am I
running into a limit here? I checked help limits and the limit to
number of characters in a macro is way higher ( 1,081,511 in Stata
SE). If indeed there is a limit, can anyone point out a work around?

Thank you,
Radu
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