Post hoc tests
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
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