R: Parallel mapply-like functionality

bpmapply {BiocParallel}

R Documentation

Parallel mapply-like functionality

Description

bpmapply applies FUN to first elements of ..., the second elements and so on. Any type of object in ... is allowed, provided length, [, and [[ methods are available. The return value is a list of length equal to the length of all objects provided, as with mapply.

Usage


bpmapply(FUN, ..., MoreArgs=NULL, SIMPLIFY=TRUE, USE.NAMES=TRUE,
    BPREDO=list(), BPPARAM=bpparam())

## S4 method for signature 'ANY,missing'
bpmapply(FUN, ..., MoreArgs=NULL, SIMPLIFY=TRUE, 
    USE.NAMES=TRUE, BPREDO=list(), BPPARAM=bpparam())

## S4 method for signature 'ANY,BiocParallelParam'
bpmapply(FUN, ..., MoreArgs=NULL, 
    SIMPLIFY=TRUE, USE.NAMES=TRUE, BPREDO=list(), BPPARAM=bpparam())

Arguments

`FUN`	The `function` to be applied to each element passed via `...`.
`...`	Objects for which methods `length`, `[`, and `[[` are implemented. All objects must have the same length or shorter objects will be replicated to have length equal to the longest.
`MoreArgs`	List of additional arguments to `FUN`.
`SIMPLIFY`	If `TRUE` the result will be simplified using `simplify2array`.
`USE.NAMES`	If `TRUE` the result will be named.
`BPPARAM`	An optional `BiocParallelParam` instance defining the parallel back-end to be used during evaluation.
`BPREDO`	A `list` of output from `bpmapply` 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.

Details

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

Value

See mapply.

Author(s)

Michel Lang . Original code as attributed in mclapply.

Examples

showMethods("bpmapply")

fun <- function(greet, who) {
    paste(Sys.getpid(), greet, who)
}
greet <- c("morning", "night")
who <- c("sun", "moon")

param <- bpparam()
original <- bpworkers(param)
bpworkers(param) <- 2
result <- bpmapply(fun, greet, who, BPPARAM = param)
cat(paste(result, collapse="\n"), "\n")
bpworkers(param) <- original

[Package BiocParallel version 1.14.2 Index]