[R] Need help in calling C code from R

Prof Brian Ripley ripley at stats.ox.ac.uk
Sun Nov 16 16:51:31 CET 2008

See the manual we wrote to help you, 'Writing R Extensions'.  If that is 
not enough, the topic is covered in several books on R, including 'S 
Programming'.  You can also find on-line tutorials of various qualities 
(often obsolete or inaccurate).

On Sun, 16 Nov 2008, Rainer M Krug wrote:

> Hi
> I would like to implement the "Earth Movers Distance" into R and found
> the code in C on the following page:
> http://www.cs.duke.edu/~tomasi/software/emd.htm
> Unfortunately, I don't know much (nearly nothing) about C and how to
> call it from R.
> As far as I have seen, the calling of the code from R should be rather
> straight forward, but there are still several things I don't
> understand.
> Could somebody please help me in calling the code from R?
> Thanks,
> Rainer
> P.S: if the code works nicely, I would like to either put it into a
> package or add it to one.
> -- 
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
> Biology, UCT), Dipl. Phys. (Germany)
> Centre of Excellence for Invasion Biology
> Faculty of Science
> Natural Sciences Building
> Private Bag X1
> University of Stellenbosch
> Matieland 7602
> South Africa
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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