Date: Thu, 27 May 2004 15:30:38 -0400
Reply-To: Peter Flom <flom@NDRI.ORG>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Peter Flom <flom@NDRI.ORG>
Subject: Re: PROC GLM - LSMEANS
Content-Type: text/plain; charset=US-ASCII
Well, the short answer is right in your log file: The X'X matrix has
been found to be singular.
Without more detail, it's hard (at least for me) to figure out what's
going on, but one guess is that you've got some sort of problem with the
coding of the class variables. Another is that one of your combinations
of variables has no cases in it. Another is that, while none of the
combinations have NO cases, you've 'sliced the pie too thin' and gotten
mush.
Could you provide some detail?
Peter
Peter L. Flom, PhD
Assistant Director, Statistics and Data Analysis Core
Center for Drug Use and HIV Research
National Development and Research Institutes
71 W. 23rd St
www.peterflom.com
New York, NY 10010
(212) 845-4485 (voice)
(917) 438-0894 (fax)
>>> Lalaine Valignota <lvalignota@ALLANTGROUP.COM> 5/27/2004 3:22:26 PM
>>>
Does anyone know why I am getting non-est lsmeans?
*********************************************************************
Program:
proc glm data=ana;
class product_offer_new pdb_list_type_new zip10r_seg;
model resp=product_offer_new pdb_list_type_new zip10r_seg /solution;
weight season_effect_weight;
lsmeans product_offer_new /stderr pdiff out=prod_adjmeans;
lsmeans pdb_list_type_new /stderr pdiff out=list_adjmeans;
lsmeans zip10r_seg /stderr pdiff out=zip_score_adjmeans;
Class Levels Values
PRODUCT_OFFER_NEW 10
PDB_LIST_TYPE_NEW 4
ZIP10R_SEG 20
Output:
NOTE: The X'X matrix has been found to be singular, and a generalized
inverse was used to solve
the normal equations. Terms whose estimates are followed by the
letter 'B' are not
uniquely estimable.
The GLM Procedure
Least Squares Means
PRODUCT_OFFER_ LSMEAN
NEW RESP LSMEAN Number
Commits Non-est 1
Competitor Price Non-est 2
Content Non-est 3
General Price Non-est 4
Intro Price Non-est 5
Offer Non-est 6
Premium Offers Non-est 7
Premium Services Non-est 8
Price Choice Non-est 9
Registration Non-est 10
