I'm surprised this isn't a FAQ, but I searched all over and could not
find a
reference to it.
Chambers (1998) makes repeated references to "Chapters" in S (e.g., p.
6),
but I can find no reference to "Chapters" in R. Since Chapters were
not used
in earlier versions of S, I'm wondering if R uses them or not. If it does,
how does one get them to work? I've been unable to do so.
Marsh Feldman
[[alternative HTML version deleted]]
R does not have chapters. I believe that is related to the difference in which S stores objects in files whereas R stores them in memory. On 6/11/06, Marshall Feldman <marsh at uri.edu> wrote:> I'm surprised this isn't a FAQ, but I searched all over and could not find a > reference to it. > > > > Chambers (1998) makes repeated references to "Chapters" in S (e.g., p. 6), > but I can find no reference to "Chapters" in R. Since Chapters were not used > in earlier versions of S, I'm wondering if R uses them or not. If it does, > how does one get them to work? I've been unable to do so. > > > > Marsh Feldman > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >
On Sun, 11 Jun 2006, Marshall Feldman wrote:> I'm surprised this isn't a FAQ, but I searched all over and could not find a > reference to it.I have never seen in mentioned before. R is not an implementation of S4 as described in Chambers (1998), so I do not know where you got the idea that was relevant. (The methods package in R is an implementation of something close to the class system described in that book, but R can be used without the methods package.)> Chambers (1998) makes repeated references to "Chapters" in S (e.g., p. 6), > but I can find no reference to "Chapters" in R. Since Chapters were not used > in earlier versions of S, I'm wondering if R uses them or not. If it does, > how does one get them to work? I've been unable to do so.The closest analogues are 1) packages 2) using different working directories. Since R does not store objects on file and chapters are directories with collections of stored objects (and other things, including DLLs), the analogues cannot be very close. -- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595