[R] using MANOVA in R

[Torsten Hothorn]

On 9 May 2000, Peter Dalgaard BSA wrote:

> Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes:
> 
> > Not really any of it!  multilm fits multivariate linear models and does
> > Hotelling T^2 tests. It does not group terms for AOV, and I think is only
> > applicable for continuous variates (not factor explantory variables).
> > Certainly the help and examples only discuss that case.
> 
> Had a closer look. The factor expl.var. would seem to be there
> case-wise, so you can build the models, but Wilk's Lambda and friends
> are absent, so you cannot (easily) do multi-df model reduction tests.
> However, it's no too far off. Is the author planning to develop it
> further?

Now it is my turn, I think :-)

1) "multilm" is on my list, but there are some theoretical problems
(e.g. is the use of Moore-Penrose numerically appropriate ?) Any help by
other distributors would be very welcome!

2) "multilm" was written for the use of the stabilized multivariate tests
by Laeuter and Kropf, T^2 is only a by-product. Therefore the
documentation is heavily biased on this. 

3) I do think that one can take factors as design variables (there is an
Iris example, I think). 

4) I just had my third move this year (this time to Erlangen, Bavaria), so
time is a problem too :-)

Torsten


-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._