bplapply: Parallel lapply-like functionality

In Bioconductor/BiocParallel: Bioconductor facilities for parallel evaluation

Parallel lapply-like functionality

Description

bplapply applies FUN to each element of X. Any type of object X is allowed, provided length, [, and [[ methods are available. The return value is a list of length equal to X, as with lapply.

Usage

bplapply(X, FUN, ..., BPREDO = list(), BPPARAM=bpparam(), BPOPTIONS = bpoptions())

Arguments

X	Any object for which methods length, [, and [[ are implemented.
FUN	The function to be applied to each element of X.
...	Additional arguments for FUN, as in lapply.
BPPARAM	An optional BiocParallelParam instance determining the parallel back-end to be used during evaluation, or a list of BiocParallelParam instances, to be applied in sequence for nested calls to BiocParallel functions.
BPREDO	A list of output from bplapply with one or more failed elements. When a list is given in BPREDO, bpok is used to identify errors, tasks are rerun and inserted into the original results.
BPOPTIONS	Additional options to control the behavior of the parallel evaluation, see bpoptions.

Details

See methods{bplapply} for additional methods, e.g., method?bplapply("MulticoreParam").

Value

See lapply.

Author(s)

Martin Morgan mailto:[e-mail]. Original code as attributed in mclapply.

See Also

• bpvec for parallel, vectorized calculations.

• BiocParallelParam for possible values of BPPARAM.

Examples

methods("bplapply")

## ten tasks (1:10) so ten calls to FUN default registered parallel
## back-end. Compare with bpvec.
fun <- function(v) {
    message("working") ## 10 tasks
    sqrt(v)
}
bplapply(1:10, fun)

Bioconductor/BiocParallel documentation built on March 7, 2024, 5:35 a.m.