Date:         Wed, 24 Mar 2010 16:19:35 -0700
Reply-To:     Reeza <fkhurshed@HOTMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Reeza <fkhurshed@HOTMAIL.COM>
Organization: http://groups.google.com
Subject:      Re: getting unique ID observations
Comments: To: sas-l@uga.edu
Content-Type: text/plain; charset=ISO-8859-1

On Mar 20, 2:18 pm, sas analysis <sasanaly...@gmail.com> wrote:
> 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.

There's also a proc freq, for each subject by answer to smoking.
I'd definitely save it to a data set rather than print it out though;

Something like this:
***NOT TESTED****

proc freq data=in noprint;
tables subject*smoking/out=test;
run;