Date:         Wed, 26 Nov 2003 16:59:55 -0500
Reply-To:     "DePuy, Venita" <depuy001@DCRI.DUKE.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "DePuy, Venita" <depuy001@DCRI.DUKE.EDU>
Subject:      Re: R-Square Negaive?
Comments: To: "Elmaache, Hamani" <Hamani.Elmaache@CCRA-ADRC.GC.CA>
Content-Type: text/plain; charset="iso-8859-1"

 Not sure the quality of the light, but I've had that issue with Proc Model
as well.  I believe the negative R^2 is a result of it being non-linear.
Been a little while so I don't remember the specifics of what I did about
it, I think just looked at MSE's to compare models instead of R^2s.

HTH,
Venita
-----Original Message-----
From: Elmaache, Hamani
To: SAS-L@LISTSERV.UGA.EDU
Sent: 11/26/2003 11:19 AM
Subject: R-Square Negaive?

Hi there.
I'm using MODEL Procedure,but I'm not familiar to this  Procedure and
I'm
surprised to NEGATIVE R-Square.
Exactly I'v gotten this outpout:
The MODEL Procedure

                 Nonlinear OLS Summary of Residual Errors

                 DF     DF
Adj
Equation      Model  Error       SSE       MSE  Root MSE  R-Square
R-Sq

amt2              4   2614    8140.1    3.1140    1.7647   -0.2179
-0.2193

Can somebady shed light on this issue?