The foreach package provides a new looping construct for executing R code repeatedly. The main reason for using the foreach package is that it supports parallel execution. The foreach package can be used with a variety of different parallel computing systems, include NetWorkSpaces and snow. In addition, foreach can be used with iterators, which allows the data to specified in a very flexible way.
Further information is available in the following help topics:
foreach |
Specify the variables to iterate over |
%do% |
Execute the R expression sequentially |
%dopar% |
Execute the R expression using the currently registered backend |
To see a tutorial introduction to the foreach package,
use vignette("foreach").
To see a demo of foreach computing the sinc function,
use demo(sincSEQ).
Some examples (in addition to those in the help pages) are included in
the ``examples'' directory of the foreach package. To list the files in
the examples directory,
use list.files(system.file("examples", package="foreach")).
To run the bootstrap example, use
source(system.file("examples", "bootseq.R", package="foreach")).
For a complete list of functions with individual help pages,
use library(help="foreach").