Re: [R] Post hoc tests

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From: Kaspar Pflugshaupt (pflugshaupt@geobot.umnw.ethz.ch)
Date: Mon 05 Mar 2001 - 18:23:15 EST 

Message-ID: <B6C90B83.81D0%pflugshaupt@geobot.umnw.ethz.ch>

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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