Hi Christophe -- I don't know whether there's a particularly elegant way. This works
setClass("A", representation(x="numeric")) setClass("B", representation(y="numeric")) setClass("C", contains=c("A", "B")) setMethod("show", "A", function(object) cat("A\n")) setMethod("show", "B", function(object) cat("B\n")) setMethod("show", "C", function(object) { callGeneric(as(object, "A")) callGeneric(as(object, "B")) cat("C\n") }) > new("C") A B C but obviously involves the developer in making explicit decisions about method dispatch when there is multiple inheritance. Martin [EMAIL PROTECTED] writes: > Hi the list > > I define a class A (slot a and b), a class C (slot c and d) and a class > E that inherit from A and B. > I define print(A) and print(B). For print(C), I would like to use both > of them, but I do not see how... > > Thanks for your help... > > Christophe > > ---------------------------------------------------------------- > Ce message a ete envoye par IMP, grace a l'Universite Paris 10 Nanterre > > ______________________________________________ > R-help@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. -- Martin Morgan Computational Biology / Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109 Location: Arnold Building M2 B169 Phone: (206) 667-2793 ______________________________________________ R-help@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.