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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._