[R] Getting names of objects passed with "..."

[Henrik Bengtsson]

I use:

foo <- function(...) {
  args <- list(...);
  names(args);
}

/Henrik

On 6/1/07, Mike Meredith <mmeredith at wcs.org> wrote:
>
> Is there a tidy way to get the names of objects passed to a function via the
> "..." argument?
>
> rbind/cbind does what I want:
>
> test.func1 <- function(...) {
>    nms <- rownames(rbind(..., deparse.level=1))
>    print(nms)
> }
>
> x <- "some stuff"
> second <- "more stuff"
> test.func1(first=x, second)
> [1] "first"  "second"
>
> The usual 'deparse(substitute())' doesn't do it:
>
> test.func2 <- function(...) {
>    nms <- deparse(substitute(...))
>    print(nms)
> }
> test.func2(first=x, second)
> [1] "x"
>
> I'm using "nms <- rownames(rbind(...))" as a workaround, which works, but
> there must be a neater way!
>
> rbind/cbind are .Internal, so I can't pinch code from there.
>
> Thanks,  Mike.
>
> --
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