Peter Dalgaard BSA (p.dalgaard@biostat.ku.dk)
22 Oct 1999 15:12:00 +0200
R.E.Darnell@newcastle.ac.uk (R.E. Darnell) writes:
> I understand that there are two ways to define the response for
> binomial case in R(S).
> 1) As a vector of p's for which the number of trials is assumed
> to be 1
> 2) As a 2 column matrix, the first being the number of sucesses, the
> second being the number of failures.
3) as a vector of p's, the number of trials given in the weights=
argument
> Two questions I have concern the 2nd case.
>
> Does the model.response function convert the number of successes
> into a propn? I couldn't see that it did.
Nope. That's not it's job. It just pulls out the relevant bits of the
model frame.
> and how is the denominator included as a (prior) weight?
Have a look at the initialize expression as defined in binomial().
-- 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-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@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
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