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Re: st: using pwd in an if statement


From   Jeph Herrin <jherrin@flyingbuttress.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: using pwd in an if statement
Date   Wed, 17 May 2006 10:17:44 -0400

Try

. capture cd Hannah

This will -cd- if possible and continue otherwise.



Christopher W. Ryan wrote:
If I am in a directory, say C:data\scholar\Hannah, and I type

-cd Hannah-

I get an error message, as one might expect.

I am just learning to use .do files for the bulk of my analyses and data
manipulations, a la Svend Juul's great book.  I usually try to -cd- to
the relevant project directory somewhere near the begining of a .do
file, then open the data file.

But if I am *already in* that directory when I run the .do file, Stata
gives the same sort of error:

cd Hannah
unable to change to Hannah
r(170);
end of do-file

Is there a way to cd on a conditional basis, such as "if I'm not already
in the Hannah directory, then change to it"?  Would this require using
something like

if c(pwd) !=


Since all of my project files are nested under a single directory for
research projects, I suppose I could always put in my do-files a -cd- to
that directory before the -cd- to the particular project directory.

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