[R] how to stop without error message?

[Gabor Grothendieck]

Not sure if this qualifies as simple but you can use callCC to force an
exit from within an inner call.  In this example we call f which calls f1
which calls f2 and then f2 exits right out to the top level returning 0.
Note that f2 must know about g:

f <- function(g) {
	f1 <- function() {
		cat("A\n")
		f2()
		cat("B\n")
	}

	f2 <- function() {
		cat("a\n")
		g(0)
		cat("b\n")
	}
	f1()
}

callCC(f)


On Mon, Nov 10, 2008 at 5:42 PM,  <Mark.Bravington at csiro.au> wrote:
> Dear list
>
> Can anyone suggest a simple way to abort execution like stop(...) does, but without issuing an "Error: ..." message?
>
> I don't want to set 'options( show.error.messages=TRUE)' because I want normal behaviour to resume after this particular stop.
>
> (Please reply personally as well as to the list, as I'm not subscribed to R-help)
>
> Thanks
> Mark
>
> --
> Mark Bravington
> CSIRO Mathematical & Information Sciences
> Marine Laboratory
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