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"lme" in R and Splus-7
3 messages · yyan liu, Bert Gunter, Dieter Menne
-----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of yyan liu Sent: Monday, February 05, 2007 11:25 AM To: r-help at stat.math.ethz.ch Subject: [R] "lme" in R and Splus-7 Hi: I used the function "lme" in R and Splus-7. With the same dataset and same argument for the function, I got quite different estimation results from these two software. Anyone has this experience before?
Why don't you try searching the archives yourself to see?
Bert Gunter Genentech Nonclinical Statistics South San Francisco, CA 94404 650-467-7374
yyan liu <zhliur <at> yahoo.com> writes:
I used the function "lme" in R and Splus-7. With the same dataset and same
argument for the function, I got
quite different estimation results from these two software. Anyone has this
experience before?
From the FAQ:
R by default uses treatment contrasts in the unordered case, whereas S uses the Helmert ones. This is a deliberate difference reflecting the opinion that treatment contrasts are more natural. Dietr