Ah, thanks, now I understand the mode of operation and will work on a more robust fix than exporting the functions.
Regards, Ulrike ---------- Original Message ----------- From: Uwe Ligges <lig...@statistik.tu-dortmund.de> To: Ulrike Grömping <gro...@beuth-hochschule.de> Cc: r-devel@r-project.org Sent: Wed, 04 Nov 2009 12:19:59 +0100 Subject: Re: [Rd] Registered S3 methods not found: Documentation bug or anomaly in function update or ... ? > Well, > > > swiss.lm > > Call: > lm.default(formula = Fertility ~ Education + Examination, data = swiss) > > That means the call is registered as lm.default and update calls that > one (and it is hidden in your namespace. > > You can fix it on your side so that the call is registered as lm(.....) > in the lm object. > > Anyway, I think it is a bit dangerous to redefine lm() the way you did it. > > Best wishes, > Uwe > > Ulrike Grömping wrote: > > Dear expeRts, > > > > I recently asked for help on an issue with S3 methods for lm. The issue > > was (in DoE.base 0.9-4) > > that function update from package stats would return an error whenever > > DoE.base was loaded, > > complaining that lm.default was not found > > (e.g. > > require(DoE.base) > > swiss.lm <- lm(Fertility~Education+Examination, swiss) > > upd.swiss.lm <- update(swiss.lm, .~.-Examination) > > ). > > > > In version 0.9-4 of DoE.base, I had followed the recommendations of > > Section 1.6.2 of "Writing R > > extensions", exporting the generic function lm and registering the > > methods (lm.design and lm.default) > > with S3method but not separately exporting them in the namespace file. > > Not having received help fast, I decided to try to explicitly export the > > method functions > > lm.design and lm.default. This did in fact remove the > > issue with not finding lm.default when using function update, and I have > > uploaded this fixed version > > as 0.9-5. > > > > Is it generally advisable to also export the method functions (i.e. > > should section > > 1.6.2 of "Writing R extensions" be revised) ? Or is there an anomaly in > > function update ? Or ...? > > Explanations are appreciated. > > > > Thanks and regards, Ulrike > > ------- End of Original Message ------- [[alternative HTML version deleted]]
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