[Rd] Matrix multiplication in a C code

[mel]

Mathieu Ribatet a écrit :
>     Dear list members,
> 
> I've got a small question on matrix multiplications in a C code. Because 
> of a really cpu demanding likelihood, I had to use a C code within an R 
> function wrapper. I'm pretty sure that there is already one good code 
> for matrix multiplication in C - maybe in the R source code itself - but 
> I wasn't able to find it.
> 
> Anyone as an idea on how to handle matrix multiplications?

fwiw :
from a post on Rd on 4/4/2007 :
Just-in-time compiler for R
http://www.milbo.users.sonic.net/ra/index.html