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Re: st: QUestion using -fs- package
From
"Michael N. Mitchell" <[email protected]>
To
[email protected]
Subject
Re: st: QUestion using -fs- package
Date
Tue, 08 Jun 2010 13:31:30 -0700
Dear Nuno
I think you are 99% of the way there. I think the problem is that the variable -file-
needs to be a string variable, thus you might try this....
qui fs *.dta
foreach f in `r(files)' {
use `f', clear
cap drop file
gen str50 file="`f'"
save, replace
}
Two other thoughts...
1) the -save , replace- is a pretty scary command. If you make a bad mistake you could
destroy the original file. So, when doing something experimental like this, it is prudent
to have a solid backup of all the data files.
2) You (or someone else) might be interested in putting a -note- in the data file
(rather than a variable). If you wanted to do that, you could change the -gen- command to be
note : This comes from the `f' data file
I hope that helps,
Michael N. Mitchell
Data Management Using Stata - http://www.stata.com/bookstore/dmus.html
A Visual Guide to Stata Graphics - http://www.stata.com/bookstore/vgsg.html
Stata tidbit of the week - http://www.MichaelNormanMitchell.com
On 2010-06-08 1.11 PM, Nuno Soares wrote:
Hi everyone,
I'm using the -fs- command to look into a directory for several files, open
them, insert a new variable with the file name, and save them. The code is
the following:
qui fs *.dta
foreach f in `r(files)' {
use `f', clear
cap drop file
gen file=`f'
save, replace
}
However, when I run the code I get the following error code:
wscopear: operator invalid
r(198);
Basically the gen file=`f' command is returning the above error. Any way of
doing what it is intended to do?
All the best,
Nuno
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