[R] writing function with ,... )

[Gabor Grothendieck]

Try this:

> test <- function(x, ...) {
+ print(x)
+ dots <- list(...)
+ if ("y" %in% names(dots)) print(dots$y)
+ }
> test(3, y = 43)
[1] 3
[1] 43
> test(4, z = 44)
[1] 4
>

On 11/30/06, Carmen Meier <carmei3 at web.de> wrote:
> Hi to all
> I did not found the right hints for functions with the dot-dot-dot argument.
> Is it possible to write own functions with the tree dots and if yes
> what's wrong with the following example?
>
>
> test <- function(x, ...)
> {
> print (x)
> if (exists("y"))print(y)
> if (exists("z"))print(z)
> }
>
> test(4,y=2)
>
> With regards Carmen
>
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