[R] exit function in R?

[Rolf Turner]

On 3/06/2008, at 1:18 AM, Federico Abascal wrote:

> Hi,
> This is likely an stupid question, but I cannot find the solution.
> I am searching for an "exit" function, to end the execution of an R
> script if some condition is not filled.
> Any clue?

Others have suggested using stop().  It might be the case that the
condition not being fulfilled is not actually a sign of an error,
but simply of a different, perhaps ``marginal'' situation in which
a different sort of action or calculation is required.  In which
case what you want is return().

Trivial e.g.:

foo <- function(x) {
	if(any(x<=0)) return(42)
	y <- sum(log(x))
	y
}

	cheers,

		Rolf Turner

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