R-beta: Variance Components?
bates at stat.wisc.edu
Wed Jul 8 23:40:16 CEST 1998
JMorris at cldx.com (Morris, Jeffrey) writes:
> Is there any capability yet to do variance components estimation?
> I have looked!
ML and REML estimates of variance components in many models can be
obtained with the lme library in the src/contrib section of CRAN.
When you expand the tar file there is a subdirectory called SAS_Mixed
with transcripts of example analyses paralleling those in the book
"SAS System for Mixed Models". If you are familiar with SAS PROC
MIXED that might be a faster way to learn lme syntax that going
through the manual pages.
Also there is work being done to produce functions in R that parallel
the aov in S-PLUS.
Douglas Bates bates at stat.wisc.edu
Statistics Department 608/262-2598
University of Wisconsin - Madison http://www.stat.wisc.edu/~bates/
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