[R] Dunnett's test
bwheeler at echip.com
Tue Oct 23 05:08:20 CEST 2001
Hsu gives Fortran routines for the critical
values. See http://www.stat.ohio-state.edu/~jch/
Peter Dalgaard BSA wrote:
> 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
Bob Wheeler --- (Reply to: bwheeler at echip.com)
ECHIP, Inc. --- (302) 239-6620, voice and
724 Yorklyn Rd., Hockessin, DE 19707
Randomness comes in bunches
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
More information about the R-help