R-alpha: new class for chisquare tests?
Peter Dalgaard BSA
p.dalgaard@kubism.ku.dk
22 Aug 1997 00:13:15 +0200
Kurt Hornik <hornik@ci.tuwien.ac.at> writes:
>
> I sort of asked this before, but perhaps not explicitly enough.
>
> In my ctest collection, there are several chisquare-based tests. For
> some of them, it may be useful to also return information on expected
> (and observed) counts. The question is, how should this be done. Of
> course, there is no problem adding the corresponding components to the
> list returned by the functions. However, as these are of class `htest',
> the components don't show up in the printed output.
>
> (Of course, one can easily obtain them if they are in the list, but I
> think Peter is with me when I say that this is not the right thing in an
> intro course.)
>
> * Should we extend print.htest() to display info on expected and
> observed counts in case it is there?
>
> * (Should we have an extra argument to control this behavior?)
>
> * Or should there be a class "chisqtest" with a slightly different print
> and perhaps also summary method?
>
> * Or ...?
Couldn't the basic logic of print.lm/summary.lm/anova.lm be applied
here too? I.e.
h<-chisquare.test(blipblop)
observed(h)
fitted(h)
partials(h)
This might be implemented simply by adding items to the return list,
and have fitted.htest() extract the relevant item if it is there.
Or maybe slightly safer from a name-space point of view: add *one*
extra item ("comp", say) which is a list containing the other stuff.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
r-devel 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-devel-request@stat.math.ethz.ch
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-