PS. All class names were upper-case, I messed up while copying the code, but it has no effect on the result. Thanks for help.
--Hun On Mon, 23 Nov 2009 10:28:37 +0100 "Hun S. Tesatte" <[email protected]> wrote: >Dear R-ers, > >I don't understand the following, maybe someone will help me >explain: > >> setClasss('A') >[1] "A" >> new('a') >Error in new("a") : > trying to generate an object from a virtual class ("a") > >> setClass('b', contains='a') >[1] "b" >> new('b') >An object of class “b” ><S4 Type Object> > >In what way is B more concrete than A so that it's possible do >instantiate B but not A? I don't quite get it. B adds nothing to >nothing, and yet it's instantiable, while it's base is not. Makes >no sense to me. > >-- Hun ______________________________________________ [email protected] 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.
