Date:         Tue, 15 Apr 1997 10:28:54 -0500
Reply-To:     "jerry mcgwin, jr." <mcgwin@EYES.UAB.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         "jerry mcgwin, jr." <mcgwin@EYES.UAB.EDU>
Subject:      contrasts in glm?
Content-Type: text/plain; charset="us-ascii"

i have what may be a simple question. i have a two independent class
variables and a continuous dependent variable. i am using glm to compare
the group means of one variable within levels of the other variable. for
example:
 
           Z       1       2
X
1                15      17
2                25      27
3                10      35
 
i want to compare level 3 to 1 and level 2 to 1 within level 1 of Z and the
same within level 2 of Z. can anyone provide insight as to how to formulate
this using proc glm? after plodding through the manual it appears that a
contrast statement might do the trick. thanks.
 
regards.
 
 
gerald mcgwin, jr, ms
 
==================================================
department of epidemiology       department of ophthalmology
school of public health                   school of medicine
tidwell hall                                           eye foundation hospital
u n i v e r s i t y  of  a l a b a m a  at  b i r m i n g h a m
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gmcgwin@epi.soph.uab.edu         mcgwin@eyes.uab.edu
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