Date:         Thu, 3 Mar 2011 08:08:49 -0800
Reply-To:     hua gang <hg448@YAHOO.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         hua gang <hg448@YAHOO.COM>
Subject:      a function or quick way to compute average with min number of
              non-missing data points
In-Reply-To:  <201103031531.p23BleZf005376@waikiki.cc.uga.edu>
Content-Type: text/plain; charset=us-ascii

I wanted the average for each subject as long as they have 3 non-missing data
points (id 03 should be dropped because he only has two non-missing data
points).  Is there any quick way to do it?

Thanks,

Jian

 datalines;
01 1  3   4   .
02 1  2   1   2
03 1  .   2   .
;