glm.nb, anova.negbin
On Wed, 26 Sep 2001, Jari Oksanen wrote:
juli at ceam.es said:
Error in get(x, envir, mode, inherits) : invalid first argument In addition: Warning message: tests made without re-estimating theta in: anova.negbin(t2) >
I looked quickly, and it seems that this error comes actually from
`anova.glm' and from the following `get':
if (!is.function(method))
method <- get(method, mode = "function")
`anova.negbin' sends the `negbin' `object' to `anova.glm', but the
negbin object does not have a method (`glm' objects have method
"glm.fit"). There seem to be some other differences in `negbin' and
`glm' objects, so that `anova.glm' can't handle them (e.g., glm.control
object is missing in `negbin' object).
I would like to help, but I don't have time now (got to mark exams).
Yes, that's it: R is incompatible with S. Although the information
is in the saved call, R uses a duplicate copy. In glm.nb() adding
fit$method <- method
fit$control <- control
at the end seems to fix it, but without an example I can reproduce,
I cannot of course be sure.
And that was my main point: if reporting problems *please* report the
results of traceback(), and if possible a small reproducible example.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._