Message-ID: <x2og6g87f6.fsf@blueberry.kubism.ku.dk>
Date: 2000-05-09T08:16:45Z
From: Peter Dalgaard
Subject: using MANOVA in R
In-Reply-To: Prof Brian D Ripley's message of "Tue, 9 May 2000 08:02:26 +0100 (BST)"
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?
> norm is about multivariate normal data, no regressors, AFAIK. Various
> people have pointed out the dangers of that: how often is iid on a
> multivriate normal population appropriate?
Not often, but sometimes things fall apart into several homogeneous
groups and then it can be used as a building block. I've used
something like this for an RCT a while back back.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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