On 8/22/07, Søren Højsgaard <[EMAIL PROTECTED]> wrote:
> I have a function and a vector, say
> f <- function(a,b){a+b}
> x <- c(2,3)
> I want to "evaluate f on x" in the sense of computing f(x[1],x[2]). I would
> like it to be so that I can write f(x). (I know I can write a wrapper
> function g <- function(x){f(x[1],x[2])}, but this is not really what I am
> looking for). Is there a general way doing this (programmatically)? (E.g. by
> "unpacking" the elements of x and putting them in the "right places" when
> calling f...)
> I've looked under formals, alist etc. but so far without luck.
I hope that the following helps:
> f <- function(x) {sum(x)}
> f(c(2,3))
[1] 5
> f(c(2,3,5))
[1] 10
>
Paul
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