[R] import data from splus

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Nov 14 16:45:48 CET 2000

On Tue, 14 Nov 2000, David James wrote:

> hi,
> I have a somewhat similar problem.  I also need to move huge, somewhat
> complicated objects from Splus5 to R.  I need data.restore() in R 
> (in my case it should be S4/Splus5 aware).
> I took a quick look at the Rstream manual, but I didn't see anything that
> I could easily use/modify for this problem (right?).

readSfile could be modified (see later).

> Is there something out there I could use, or will data.dump()/data.restore()
> need to be written for R? (BTW I think this is not an R issue per se, but
> rather an R-S interface issue -- it is a fact that most of my collaborators
> use Splus.)

We are hoping to have a data.restore() S3-style.  Duncan Murdoch has
been working on one, hit a snag with blank lines that R-devel solves
(via readLines or even scan now).  (Duncan: where is this at?)

Our problem is that the only firm information we have is on S3-style dump
format, and that for vector and list objects with attributes.  If anyone
can extend this to a description of what S4 uses, we could maybe go

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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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