[R] multicore by(), like mclapply?

[Hadley Wickham]

On Mon, Oct 10, 2011 at 4:14 PM, Joshua Wiley <jwiley.psych at gmail.com> wrote:
> I could be waay off base here, but my concern about presplitting the data is that you will have your data, and a second copy of our data that is something like a list where each element contains the portion of the data for that split.  Good speed wise, bad memory wise.  My hope with the technique I showed (again I may not have accomplished it) was to only have at anyone time, the original data and a copy of the particular elements being worked with.  Of course  this is not an issue if you have plenty of memory.

That's exactly what plyr does behind the scenes.

Hadley

-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/