for.each: Zipped function application

In wwbrannon/schemeR: Ports of Lisp/Scheme Features to R

Description

for.each takes a function and a set of sequences (vectors, lists or pairlists), and applies the function successively to each set of elements that are in the sequences at the same positional index.

Usage

for.each(f, ...)

Arguments

f	A function to apply.
...	Vectors, lists or pairlists.

Details

This function combines link{zip} and link{do.call}, to apply a provided function successively to the elements of several sequences. The arity of the function must be compatible with the number of sequences passed as arguments; if not, an error will result.

As in zip, if not all sequences are the same length, shorter sequences will be recycled to match the lengths of longer ones.

Value

The value of f on the last set of parameters supplied to it, or NULL if no or only zero-length sequences were supplied as arguments.

See Also

link{zip} for the operation of zipping the parameter sequences.

Examples

f <- function(...) print(as.numeric(list(...)))
invisible(for.each(f, 1:5, 6:10, 11:15))

wwbrannon/schemeR documentation built on May 4, 2019, 12:03 p.m.