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st: finding number of unique values of a variable


From   Dick Campbell <dcamp@uic.edu>
To   "statalist-hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: finding number of unique values of a variable
Date   Sun, 17 Aug 2008 12:27:09 -0500

I would like to loop over the list of variables in a data set and
find the number of unique values for each variable, regardless
of whether the variable is numeric or string. There are several
ways to do this for a numeric variable, but I don't see a convenient
way to do it for a mixture of string and numeric variables.






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