Date: Sat, 25 Jun 2005 13:14:44 -0700
Reply-To: tanwan <tanwanzang@YAHOO.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: tanwan <tanwanzang@YAHOO.COM>
Subject: On Proc SurveyReg
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Greetings to the Learned SAS-L Community.
I get an error but I do not know how to decipher it. What does the
following error message mean?:
Matrix X'WX is singular and a generalized inverse was used to solve the
normal equations. Estimates are not unique.
What are its implications, if any?
Thanks in advance.