On Nov 5, 2012, at 6:37 PM, Iurie Malai <iurie.ma...@gmail.com> wrote:
> Thanks all! > > At least for me, the manual text has a contradiction. If R is much like S, > in other words it is a "diverged" S, as Michael says, it can't include > itself as a component part. I'd think something like C/C++ -- the later includes the former ... mostly ... except where it doesn't. Michael > > Regards, > Iurie > > > 2012/11/5 R. Michael Weylandt <michael.weyla...@gmail.com> > >> On Mon, Nov 5, 2012 at 4:43 PM, Iurie Malai <iurie.ma...@gmail.com> wrote: >>> In the "Introduction and preliminaries" the "An Introduction to R" manual >>> says about R: "... Among other things it has ... a well developed, simple >>> and effective programming language (Called 'S') ... ". Now I'm a little >>> confused. This means that language S is a component part of R? And S is >> not >>> free? But R is free? Or the mentioned S is only "a free implementation" >> of >>> the "true S"? Can anybody explain this? I want to know. >>> >>> Thank you! >>> >> >> 'S' is a language, invented at Bell Labs >> (http://en.wikipedia.org/wiki/S_(programming_language)) which has two >> major implementations. S-Plus, which is a commercial product, and R, >> which you know well. >> >> R was originally quite like S/S-Plus, but it's changed over time and >> diverged aways and now I believe the R README says R is 'not unlike' >> S. >> >> Consider, e.g., Python, which is a language (specified in >> documentation) with multiple implementations: CPython, PyPy, Jython, >> IronPython, etc. If R and S-Plus had identical functionality they >> would be different concrete realizations of the abstract 'S' language, >> but they're more than slightly different in practice. >> >> Not sure if that helps at all.... >> >> Michael >> > > > > -- > Iurie Malai > > +(373) 79288710 - Moldcell > +(373) 67459710 - Unite > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.
