So, R (as a language) can be viewed as an extended S language (S + some improvements)? And the R environment includes this (extended) language + extensions?
2012/11/5 William Dunlap <wdun...@tibco.com> > Almost all syntactically correct S code works in R and S+ the same as it > did in S > (the last version of which came out c. 1999), modulo bug fixes. Off the > top of > my head, I'd say the only things that were eliminated were the use of the > underscore > as the assignment operator and the elimination of the keywords 'T' and 'F'. > R extends the language, e.g., to do lexical scoping, and S+ has stayed > truer to S. > Hence I would say that the language interpreted by R is almost a superset > of the > S language as it existed in 1999. > > (I'm speaking of the language itself, not the packages build using the > language.) > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf > > Of Iurie Malai > > Sent: Monday, November 05, 2012 11:38 AM > > To: Patrick Burns > > Cc: r-help@r-project.org > > Subject: Re: [R] A general question: Is language S a component part of R? > > > > After reading the 'Inferno-ish R' the first thing that comes to mind is > > that R is very much like S, but it's still different (R is not S), so it > > can't contain the S as a programming language, as the manual says. Or I'm > > wrong? > > > > > > 2012/11/5 Patrick Burns <pbu...@pburns.seanet.com> > > > > > There is a bit of history in: > > > > > > http://www.portfolioprobe.com/**2012/05/31/inferno-ish- > > r/<http://www.portfolioprobe.com/2012/05/31/inferno-ish-r/> > > > > > > Pat > > > > > > > > > > > > On 05/11/2012 17:09, R. Michael Weylandt wrote: > > > > > >> 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)< > http://en.wikipedia.org/wik > > i/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 > > >> > > >> ______________________________**________________ > > >> R-help@r-project.org mailing list > > >> https://stat.ethz.ch/mailman/**listinfo/r- > > help<https://stat.ethz.ch/mailman/listinfo/r-help> > > >> PLEASE do read the posting guide http://www.R-project.org/** > > >> posting-guide.html <http://www.R-project.org/posting-guide.html> > > >> and provide commented, minimal, self-contained, reproducible code. > > >> > > >> > > > -- > > > Patrick Burns > > > pbu...@pburns.seanet.com > > > twitter: @portfolioprobe > > > http://www.portfolioprobe.com/**blog < > http://www.portfolioprobe.com/blog> > > > http://www.burns-stat.com > > > (home of 'Some hints for the R beginner' > > > and 'The R Inferno') > > > > > > > > > > > -- > > 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. > -- 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.
