# mapply

##### Apply a Function to Multiple List or Vector Arguments

`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.

##### Usage

```
mapply(FUN, …, MoreArgs = NULL, SIMPLIFY = TRUE,
USE.NAMES = TRUE)
```

##### Arguments

- FUN
- function to apply, found via
`match.fun`

. - …
- arguments to vectorize over (vectors or lists of strictly positive length, or all of zero length). See also ‘Details’.
- MoreArgs
- a list of other arguments to
`FUN`

. - 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.

##### Details

`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. Arguments with classes in `…`

will be accepted, and their
subsetting and `length`

methods will be used.

##### Value

A list, or for `SIMPLIFY = TRUE`

, a vector, array or list.

##### See Also

`sapply`

, after which `mapply()`

is modelled. `outer`

, which applies a vectorized function to all
combinations of two arguments.

##### Examples

`library(base)`

```
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 = "")
utils::str(mapply(word, LETTERS[1:6], 6:1, SIMPLIFY = FALSE))
```

*Documentation reproduced from package base, version 3.4.0, License: Part of R 3.4.0*

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