Message-ID: <B6C90B83.81D0%pflugshaupt@geobot.umnw.ethz.ch>
Date: 2001-03-05T08:23:15Z
From: Kaspar Pflugshaupt
Subject: Post hoc tests
In-Reply-To: <memo.566039@cix.compulink.co.uk>
On 2/27/01 8:00 AM, Graham Smith wrote:
> This is only partly an R question, but this seems a good place to ask.
>
> Like many, if not most, statistics programs, R has no post hoc tests
> for Kruskal Wallis or Friedman, and as far as I can make out they are
> not available in any of the R packages. I would be grateful if someone
> could point me in the right direction if I am wrong.
The math is not as simple as in the parametric case.
I've found some non-parametric post-hoc tests in Zar, Biostatistical
Analysis, 4th ed, Prentice Hall, Chapter 11. (Nemenyi/Dunn test and some
variations thereof, with explanations of advantages/drawbacks). They should
be easy to implement, if you know some R.
Cheers
Kaspar Pflugshaupt
--
Kaspar Pflugshaupt
Geobotanisches Institut
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