[Rd] C code in packages with complex arguments/returned value

[Prof Brian Ripley]

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