Date:         Thu, 26 Nov 2009 04:04:49 -0800
Reply-To:     Emanuela <manup9@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Emanuela <manup9@GMAIL.COM>
Organization: http://groups.google.com
Subject:      reapeted measurements
Comments: To: sas-l@uga.edu
Content-Type: text/plain; charset=ISO-8859-1

Hello everybody,

I have collected some measurements of the same thing at different
time.

I would like to see if there are differences among the measures I
took. following is an example:
For the same subject there are different measurements at different
date time:

date  measure
11/8/2006   123.10
2/7/2007   122.93
5/28/2007  122.80
12/17/2007  122.80
12/3/2008   122.92
2/26/2009   122.79

I tried with the following

  proc glm ;
      class date;
      model measure= date;
     means date\ tuckey;
 run;

I have problems with this model.. the F- value goes to infinity ... I
am wrong but I have no idea on how to procede.

thank you in advance

Emanuela