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

From: Mike Meredith <mmeredith_at_wcs.org>
Date: Thu, 31 May 2007 21:44:46 -0700 (PDT)

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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