Rhpc_apply: Parallel apply using MPI

In Rhpc: Apply-Style Dispatch for High-Performance Computing

Parallel apply using MPI

Description

MPI-based version of apply for arrays and matrices.

Usage

Rhpc_apply(cl = NULL, X, MARGIN, FUN, ...,
           usequote = ifelse(is.logical(getOption("Rhpc.usequote")),
                             getOption("Rhpc.usequote"), TRUE))

Arguments

cl	external pointer to MPI communicator
X	array or matrix
MARGIN	vector giving the subscripts which the function will be applied over. 1 indicates rows, 2 indicates columns, c(1, 2) indicates rows and columns
FUN	function to apply
...	additional arguments passed to FUN
usequote	logical; if FALSE, quote handling is skipped for performance improvement

Details

This function applies FUN to array margins specified by MARGIN, distributing the work across MPI workers.

If X has dimension subscripts not in MARGIN, those are used as the margin dimensions for applying the function.

Value

Array or matrix of results from applying FUN to the specified margins.

See Also

Rhpc_lapply, Rhpc_sapply

Rhpc documentation built on Aug. 4, 2026, 1:07 a.m.