From | Gary Longton <glongton@fhcrc.org> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: Counting unique strings |
Date | Wed, 25 Feb 2004 14:54:22 -0800 |
Paul O'Brien wrote:
I have a database of 40,000 clinic visits, with multiple visits by each patient (patient_id). How do I count the number of patients seen?
-distinct- on SSC (-ssc describe distinct-) provides one easy solution. or see the FAQ: "How do I compute the number of distinct observations" at http://www.stata.com/support/faqs/data/distinct.html - Gary * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
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