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st: string variables


From   Christopher F Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: string variables
Date   Mon, 17 May 2004 21:11:59 -0400

Umit said

I am trying to take the first two characters of a string variable using
substr command as below:

name2 = substr(name,1,2)

However I get an error message of " type mismatch". Any idea about how I can
handle this?
He did not indicate whether he was using Stata 7 or 8. I presume that there is a 'generate' in this statement. In Stata 8, one can get away with gen name2 = substr(name,1,2), but in Stata 7, one must say gen str2 name2 = etc. -- that is, you must declare the new variable of type string. Otherwise Stata thinks you are assigning a string to a (default) float, and objects. Stata 8 is smarter about that.

Kit

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