VectorizeM: Memoizing wrapper to base::Vectorize()

In WinVector/wrapr: Wrap R Tools for Debugging and Parametric Programming

Memoizing wrapper to base::Vectorize()

Description

Build a wrapped function that applies to each unique argument in a vector of arguments once.

Usage

VectorizeM(
  FUN,
  vectorize.args = arg.names,
  SIMPLIFY = TRUE,
  USE.NAMES = TRUE,
  UNLIST = FALSE
)

Arguments

FUN	function to apply
vectorize.args	a character vector of arguments which should be vectorized. Defaults to first argument of FUN. If set must be length 1.
SIMPLIFY	logical or character string; attempt to reduce the result to a vector, matrix or higher dimensional array; see the simplify argument of sapply.
USE.NAMES	logical; use names if the first ... argument has names, or if it is a character vector, use that character vector as the names.
UNLIST	logical; if TRUE try to unlist the result.

Details

Only sensible for pure side-effect free deterministic functions.

Value

adapted function (vectorized with one call per different value).

See Also

Vectorize, vapplym, lapplym

Examples

fs <- function(x) { x <- x[[1]]; print(paste("see", x)); sin(x) }
fv <- VectorizeM(fs)
# should only print "see" twice, not 6 times
fv(c(0, 1, 1, 0, 0, 1))

WinVector/wrapr documentation built on Aug. 29, 2023, 4:51 a.m.