For an example of how to write lapply()-like functions (and why not to do
this) you might wish to look at John Chambers "Programming With Data",
Appendix A.
-----Original Message-----
From: Prof Brian Ripley [mailto:ripley@stats.ox.ac.uk]
Sent: Tuesday, February 29, 2000 8:05 AM
To: s-news@wubios.wustl.edu;
coffman@hsrdaxil2.mc.duke.edu
Subject: Re: [S] looping
> Date: Tue, 29 Feb 2000 10:48:50 -0500 (EST)
> From: cynthia coffman <coffman@hsrdaxil2.mc.duke.edu>
>
> Hi! I am running some simulations using S-plus and was
wondering if anyone
had
> used "C code" to perform the outer looping for a
simulation then invoked
> Splus to do the meat of the simulation, basically all I
want to pass the
> S-plus code is the index to my datasets,,,but from what I
read about invoking
> S-plus functions from C..I am not sure it would help with
efficiency. Thanks.
Generally it would using .Call in S-PLUS 5.1, but not call_S
in 3.x/4.x.
Are you using lapply to do the outer looping? That already
does something
very similar to what you are suggesting.
--
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 272860
(secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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