Date:         Sat, 20 Mar 2010 14:18:50 -0700
Reply-To:     sas analysis <sasanalysis@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         sas analysis <sasanalysis@GMAIL.COM>
Organization: http://groups.google.com
Subject:      getting unique ID observations
Comments: To: sas-l@uga.edu
Content-Type: text/plain; charset=ISO-8859-1

This is yet a simple question which I am not knowing how to do in sas:

I have a longitudinal dataset and I need to get how many unique
observations there are for each variable.

For example, if i have 5430 subjects and 80,000 observations. how do I
get unique observations for each variable based on the 5430 (how many
of the total 5430 said yes to smoking or no, even though smoking was
measured more than 20 times?)

any help would be great.