[R-sig-ME] Fw: question about Type III sums of squares as computed in "CAR'
m51988mnew at juno.com
m51988mnew at juno.com
Fri Nov 20 16:52:48 CET 2015
I have attached the example data and the r-code and r messages.The data are example measurements of exposures on 2 occupations ( a and b)on 11 sampling days. Each occupation has one measurement per day. The 11 sampling days are at 4 sites: 3 days at 3 of the sites and 2 days at 1 site. In addition, there were three workers who did the second occupation , labelled 6,7,8, for the variable idb. I need the SAS type III sums of squares for each of the variables in the model, but you can see the error message in the R code: there are aliased coefficients in the model In SAS I believe that this problem is dealt with by placing constraints on the parameters.I would appreciate any suggestions. I think that maybe I am formulating the model wrong. Thanks,Stanley Shulman
---------- Forwarded Message ----------
From: "m51988mnew at juno.com" <m51988mnew at juno.com>
To: r-sig-mixed-models at r-project.org
Subject: question about Type III sums of squares as computed in "CAR'
Date: Wed, 18 Nov 2015 02:25:03 GMT
When I use "Anova" from the car library, I cannot get Type III sums of
squares for nested data. Maybe I am using the program wrong. SAS gives the
Type III sums of squares. Thanks for any thoughts.Stanley Shulman
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