[Rd] Announce: exact Distributions
Sun, 18 Jun 2000 12:09:45 +0200 (CEST)
I just uploaded the package exactDistr to the CRAN devel section (Fritz will
add it tomorrow, I think). ExactDistr implements the
Streitberg/Roehmel shift-algorithm for the exact distributions of
permutation- and rank tests. This is done in R (just a few lines of code)
and is IMO fast enough for m,n < 50. I added the usual [dpq]perm
functions and an example how to track the exact distribution of the
Wilcoxon-Mann-Whitney test (especially with ties).
I would like to ask the experts to have a look at this algorithm, maybe we
can add exact p-values etc. to the rank tests in R without adapting the
network algorithm this way.
The weather is beautiful here, so I will stop hacking right now.
If it is raining somewhere:
| Dipl.-Stat. Torsten Hothorn |
| Institut fuer Medizininformatik, Biometrie und Epidemiologie |
| Waldstrasse 6, D-91054 Erlangen, Deutschland |
| Tel: ++49-9131-85-22707 |
| Fax: ++49-9131-85-25740 |
| Email: Torsten.Hothorn@rzmail.uni-erlangen.de |
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