[R-sig-hpc] Matrix multiplication

[Patrik Waldmann]

What does automatically mean? Is X%*%t(X) parallelized?

Patrik

>>> Simon Urbanek <simon.urbanek at r-project.org> 03/13/12 07:27 AM >>>

On Mar 12, 2012, at 5:40 AM, Patrik Waldmann wrote:

> Dear members,
> 
> I noticed that there isn't a function for matrix multiplication in the new parallel library. What would be the most efficient way to do a matrix multiplication there?
> 

The parallel package is for *explicit* parallelization. R already does implicit parallelization (using OpenMP or multi-threaded BLAS or both) automatically - this includes matrix multiplication.

Cheers,
Simon