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Re: [S] looping

To: s-news@wubios.wustl.edu, coffman@hsrdaxil2.mc.duke.edu
Subject: Re: [S] looping
From: Prof Brian Ripley <ripley@stats.ox.ac.uk>
Date: Tue, 29 Feb 2000 16:05:08 +0000 (GMT)
Reply-to: Prof Brian Ripley <ripley@stats.ox.ac.uk>
Sender: owner-s-news@wubios.wustl.edu

> 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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