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

I believe the multicore package works on XP. It gives some basic multi-process capability, especially through offering a drop-in replacement for lapply() and a simple way to evaluate an expression in a new thread (mcparallel()).