Dunnett's test

kjetil halvorsen <kjetilh at umsanet.edu.bo> writes:

help.search("dunnett")

No help files found with alias or title matching `dunnett'

so it seems like nobody have implemented this.

for how to build it in R, see the " writing R extensions manual", and
look in ctest for examples of how to use
"htest". For writing dunnett.test, it will be a good idea to return the
result as a list with class "htest". Then the printing of the result
will be done
automatically.

Kjetil Halvorsen

The real obstacle would seem to be the distribution of the many-one
t-statistic. This doesn't seem to be available from any of the
standard subroutine sources (apstat and toms). Miller's book cites the
tables from a 1964 paper by Dunnett - I browsed through it earlier
today and it seemed that the density can be calculated explicitly, but
you need numerical integration to get the CDF. Anyone have a handful
of spare evenings to code this up?

--
   O__  ---- Peter Dalgaard             Blegdamsvej 3
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._