parallelized version of "by" and "ave"
On Mon, Dec 24, 2012 at 1:25 PM, ivo welch <ivo.welch at gmail.com> wrote:
Dear R experts--- Has anyone written parallel versions of "by" (i.e., mcby) and "ave" (i.e. mcave) ? I did ask a question like this a year ago, and then the answer was no. for those who are googling the group for the answer to this question, in the meantime, the poor man's version of "by" is mclapply( split( ds, factor ), FUN ) I don't know the poor man's version of "ave".
For ave, just parallelize the lapply in this (taken from the ave source): split(x, g) <- lapply(spllit(x, g), FUN) -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com