Date: Sun, 7 Mar 1999 23:02:44 +0000 (GMT)
From: Prof Brian D Ripley <ripley@stats.ox.ac.uk>
To: Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk>
Subject: Re: [R] ANOVA f-test
In-Reply-To: <x2yal9j7xl.fsf@blueberry.kubism.ku.dk>
On 7 Mar 1999, Peter Dalgaard BSA wrote:
> Prof Brian D Ripley <ripley@stats.ox.ac.uk> writes:
>
> > > Secondly, how can do a second evaluation using a multiple ANOVA compare using
> > > Tukey's procedure?
> >
> > Eh? That could mean several things. If you mean Tukey's method of multiple
> > comparisons, it is not currently available in R. (It is in recent versions
> > of S-PLUS.) [John Tukey is one of the most prolific of statisticians ever:
> > "Tukey's procedure" is not at all precise.]
>
> To be fair, once we're talking multiple comparisons, there's hardly
> more than one. We don't have the procedure as such, but we do have the
People write whole books about this, and I think Tukey has at least
two procedures. S-PLUS manages to find about 8, as does Yandell's book. If
I had thought it was that easy I would have added it to aov, but I didn't
and still don't. Even specifying which comparisons are to be considered
is non-trivial, I believe.
-- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._