R-beta: Splus -> R migration issues

Thomas Lumley thomas at biostat.washington.edu
Fri Aug 14 17:38:54 CEST 1998

On Fri, 28 Aug 1998, Griffith Feeney wrote:

> I've recently installed R for RH5.0 Linux and been considering moving
> existing work from Splus (Windows, 4.5). Also installed the win95 R, but
> this doesn't seem to work as well, and in any case the idea is to move
> toward Linux.
> 1 I attach and detach directories freely and often in Splus. Is it
> anticipated that it will be possible to do this in R in the future?

Yes, but don't hold your breath  ;-)

> 2 The ascii representation of Splus objects produced by dump() seems not to
> be readable by R load(). What prospect for interoperatiblity in the future?
> I note the limited facility of save() and load() at this point, but
> vectors, two dimensional arrays and functions would suit my needs.

The dump() format can be read by source().  The only disadvantage of this
is that using dump/source on large objects is very very slow, so if you
have only a few large two-dimensional objects it's quicker to use write()
and read.table().


Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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