Re: [R] Where to declare S4 classes?

From: Patrick Giraudoux <>
Date: Sun 05 Mar 2006 - 19:18:11 EST

OK. Looks like I have got it... going through the source code of sp, classes are declared as usual functions in *.R files. With the current example, suppose I must write two files of names "class-Prior.R" and "class-SamplePrior.R" including
setClass("Prior",representation(Distrib="character",Params="list")) and setClass("SamplePrior",representation("Prior",Sample="list")) respectively.

Suppose the alphabetical order of each file name may be important somehow, since "SamplePrior" cannot be defined without a prior definition of "Prior"

Can anybody confirm?

If so, I can go on with validity checking functions...


Patrick Giraudoux a écrit :
> Dear listers,
> I am making a trial to move from S3 to S4... I have created some
> classes of interest and they work acceptably well for the purpose. I
> am now wondering how to make them operate in a package. In clear when
> a package is loaded (eg library(mypackage)) where should I put the
> class descriptions:
> setClass("Prior",representation(Distrib="character",Params="list"))
> setClass("SamplePrior",representation("Prior",Sample="list"))
> so that they are created and then usable for functions after a simple
> call to library(mypackage).
> It is probably something trivial, but I could not find out something
> clear on this (eg example) in the R-help-list, writing R-extensions,
> nor in S programming... and trying to get this info through reading
> other library codes has been unsuccessful.
> Patrick
> mailing list PLEASE do read the posting guide! Received on Sun Mar 05 19:29:30 2006

This archive was generated by hypermail 2.1.8 : Mon 06 Mar 2006 - 06:09:05 EST