stian <at> mail.rockefeller.edu <stian <at> mail.rockefeller.edu> writes:
> Hi,I am wondering how to conduct Kenward-Roger correction in
> the linear mixed model using R. Any idea?
>
> Thanks a lot,
>
> Suyan
Not really possible, I'm afraid. Having already invested a huge
amount of time in making lme4 available (and this is the cutting-edge
version of linear mixed models for R), Doug Bates has declined to
spend effort implementing K-R because (1) he's not convinced of the
appropriateness of adjusting F-distribution degrees of freedom in
this way, (2) he doesn't think that the K-R algorithm will be
feasible for the sorts of large-data problems he's interested in,
(3) [can't find the reference] he finds the correspondence between
K-R's notation and his difficult.
This should probably go on an FAQ list somewhere:
By the way, RSiteSearch("Kenward-Roger") would have
yielded some information ...
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/81969.html
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/49633.html
For further information, please see the r-sig-mixed archives.
cheers
Ben Bolker
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
