Dear Brigit,
My guess is that you forgot to specify the argument family=binomial in
the call to glm().
Had you included the commands that you used as well as the error that
was produced, it wouldn't be necessary to guess.
I hope this helps,
John
On Mon, 21 Apr 2008 14:23:13 +0200
Birgit Lemcke <birgit.lemcke at systbot.uzh.ch>
wrote:> R version 2.6.2 PowerBook G4
>
> Hello R User,
>
> I try to perform an ANCOVA using the glm function.
> I have a dataset with continuous and categorical data (explanatory
> variables) and my response variable is also binary categorical.
>
> Fehler: NA/NaN/Inf in externem Funktionsaufruf (arg 4)
> Zus?tzlich: Warning messages:
> 1: In Ops.factor(y, mu) : - nicht sinnvoll f?r Faktoren (makes no
> sense for factors)
> 2: In Ops.factor(eta, offset) : - nicht sinnvoll f?r Faktoren
> 3: In Ops.factor(y, mu) : - nicht sinnvoll f?r Faktoren
>
> My dataset contains NA`s but if I try to use na.exclude, I got the
> same Error message.
>
> I thought the function should use with my dataset. What am I doing
> wrong?
>
> Thanks in advance for your help.
>
> Birgit
>
>
> Birgit Lemcke
> Institut f?r Systematische Botanik
> Zollikerstrasse 107
> CH-8008 Z?rich
> Switzerland
> Ph: +41 (0)44 634 8351
> birgit.lemcke at systbot.uzh.ch
>
> 175 Jahre UZH
> ?staunen.erleben.begreifen. Naturwissenschaft zum Anfassen.?
> MNF-Jubil?umsevent f?r gross und klein.
> 19. April 2008, 10.00 Uhr bis 02.00 Uhr
> Campus Irchel, Winterthurerstrasse 190, 8057 Z?rich
> Weitere Informationen http://www.175jahre.uzh.ch/naturwissenschaft
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
--------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/