How to make R use all processors?

Question

I have a quad-core laptop running Windows XP, but looking at Task Manager R only ever seems to use one processor at a time. How can I make R use all four processors and spee

Answer 1

As of version 2.15, R now comes with native support for multi-core computations. Just load the parallel package

library("parallel")

and check out the associated vignette

vignette("parallel")