[Rd] C code in packages with complex arguments/returned value
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Jul 1 15:58:19 CEST 2005
Search for uses of Rcomplex in package source code. The only packages on
CRAN which use it are ifs and rimage.
On Fri, 1 Jul 2005, Robin Hankin wrote:
> Hi
>
> one of my packages has a severe bottleneck at a particular function
> and I
> suspect that replacing the R code with C code would speed it up.
> The function takes complex arguments and returns a complex value.
>
> I would like to follow Best Practice here. None of the C code in my
> packages includes the ability to handle complex numbers (this is done
> by R).
>
> Does anyone know of a package that includes C code which manipulates
> and returns complex arguments that I could take a look at?
>
> Yes, there is src/main/complex.c, but I would like to see how complex
> arithmetic is
> done in a package (or how it should be done).
>
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
> tel 023-8059-7743
>
> ______________________________________________
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>
>
--
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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