[R] colSums in C

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Dec 21 22:29:23 CET 2001

I've put a first version of colSums etc in R-devel.  At present I have
concentrated on getting the details right (like handing NAs correctly,
handling integer and complex input ...) as well as full S+ compatibility.

I suspect that for speed one should be using BLAS routines, but so far
I've done no optimization.  Indeed, not even of the C code since in my
experience compilers are better at that than humans.

As I said, just a first pass!

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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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