From Torsten.Hothorn@rzmail.uni-erlangen.de  Sun Jun 18 11:09:45 2000
From: Torsten.Hothorn@rzmail.uni-erlangen.de (Torsten Hothorn)
Date: Sun, 18 Jun 2000 12:09:45 +0200 (CEST)
Subject: [Rd] Announce: exact Distributions
Message-ID: <Pine.LNX.4.21.0006181208240.24384-100000@artemis.imbe.med.uni-erlangen.de>


Hi,

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:

http://www.bioinf.uni-hannover.de/~torsten/exactDistr_0.1-2.tar.gz

Torsten


 _______________________________________________________________________
|									|
|	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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[Rd] Announce: exact Distributions
Torsten Hothorn