>>>>> "Ali" == Ali - <[EMAIL PROTECTED]> >>>>> on Wed, 20 Apr 2005 15:45:09 +0000 writes:
Ali> Thanks a lot Tony. I am trying to apply the overloading Ali> to the methods created by R.oo package and, Ali> unfortunately, R.oo uses S3-style classes; so I cannot Ali> use the features of S4 methods as you described. On the Ali> other hand, I caouldn't find a decent OO package which Ali> is based on S4 AND comes with the official release of Ali> R. Ali, maybe we R-core members are not decent enough. But we strongly believe that we don't want to advocate yet another object system additionally to the S3 and S4 one, and several of us have given talks and classes, even written books on how to do "decent" object oriented programming `just' with the S3 and/or S4 object system. No need of additional "oo" in our eyes. Your main problem is that you assume what "oo" means {which may well be true} but *additionally* you also assume that OO has to be done in the same way you know it from Python, C++, or Java.. Since you are new, please try to learn the S4 way, where methods belong to (generic) functions more than to classes in some way, particularly if you compare with other OO systems where methods belong entirely to classes. This is NOT true for R (and S-plus) and we don't want this to change {and yes, we do know about C++, Python, Java,... and their way to do OO}. Please also read in more details the good advice given by Tony Plate and Sean Davis. Martin Maechler, ETH Zurich ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel