| mapply | R Documentation |
mapply is a multivariate version of sapply.
mapply applies FUN to the first elements of each ...
argument, the second elements, the third elements, and so on.
Arguments are recycled if necessary.
.mapply() is a bare-bones version of mapply(), e.g., to be
used in other functions.
mapply(FUN, ..., MoreArgs = NULL, SIMPLIFY = TRUE,
USE.NAMES = TRUE)
.mapply(FUN, dots, MoreArgs)
FUN |
function to apply, found via |
... |
arguments to vectorize over (vectors or lists of strictly positive length, or all of zero length). See also ‘Details’. |
dots |
|
MoreArgs |
a list of other arguments to |
SIMPLIFY |
logical or character string; attempt to reduce the
result to a vector, matrix or higher dimensional array; see
the |
USE.NAMES |
logical; use the names of the first ... argument, or if that is an unnamed character vector, use that vector as the names. |
mapply calls FUN for the values of ...
(re-cycled to the length of the longest, unless any have length zero),
followed by the arguments given in MoreArgs. The arguments in
the call will be named if ... or MoreArgs are named.
For the arguments in ... (or components in dots) class specific
subsetting (such as [) and length methods will be
used where applicable.
A list, or for SIMPLIFY = TRUE, a vector, array or list.
sapply, after which mapply() is modelled.
outer, which applies a vectorized function to all
combinations of two arguments.
mapply(rep, 1:4, 4:1)
mapply(rep, times = 1:4, x = 4:1)
mapply(rep, times = 1:4, MoreArgs = list(x = 42))
mapply(function(x, y) seq_len(x) + y,
c(a = 1, b = 2, c = 3), # names from first
c(A = 10, B = 0, C = -10))
word <- function(C, k) paste(rep.int(C, k), collapse = "")
## names from the first, too:
utils::str(L <- mapply(word, LETTERS[1:6], 6:1, SIMPLIFY = FALSE))
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