snow (version 0.1-1)

snow-parallel: Higher Level SNOW Functions

Description

Parallel versions of apply and related functions.

Usage

parLapply(cl, x, fun, ...)
parSapply(cl, X, FUN, ..., simplify = TRUE, USE.NAMES = TRUE) 
parApply(cl, X, MARGIN, FUN, ...)
parRapply(cl, x, fun, ...)
parCapply(cl, x, fun, ...)
parMM(cl, A, B)

Arguments

cl

cluster object

fun

function or character string naming a function

X

array to be used

FUN

function or character string naming a function

MARGIN

vector specifying the dimensions to use.

Details

parLapply, parSapply, and parApply are parallel versions of lapply, sapply, and apply.

parRapply and parCapply are parallel row and column apply functions for a matrix x; they may be slightly more efficient than parApply.

parMM is a very simple(minded) parallel matrix multiply; it is intended as an illustration.

For more details see http://www.stat.uiowa.edu/~luke/R/cluster/cluster.html.

Examples

cl <- makeSOCKcluster(c("localhost","localhost"))
parSapply(cl, 1:20, get("+"), 3)