| body {base} | R Documentation |
Access to and Manipulation of the Body of a Function
Description
Get or set the body of a function.
Usage
body(fun = sys.function(sys.parent()))
body(fun, envir = parent.frame()) <- value
Arguments
fun |
a function object, or see Details. |
envir |
environment in which the function should be defined. |
value |
an expression or a list of R expressions. |
Details
For the first form, fun can be a character string
naming the function to be manipulated, which is searched for from the
parent environment.
If it is not specified, the function calling body is used.
Value
body returns the body of the function specified.
The assignment form sets the body of a function to the list on the right hand side.
See Also
alist,
args,
function.
Examples
body(body)
f <- function(x) x^5
body(f) <- expression(5^x)
## or equivalently body(f) <- list(quote(5^x))
f(3) # = 125
body(f)