Re: [R] Chapters

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Mon 12 Jun 2006 - 16:07:08 EST

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@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

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Received on Mon Jun 12 16:10:49 2006

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