R help - Jun 2008 - exit function in R?

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?

Thank you in advance!
Federico

try this:

stop("Message")
warning("Message")

Best
Markus

Federico Abascal schrieb:
> 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?
>
> Thank you in advance!
> Federico
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>   

-- 
Dipl.-Tech. Math. Markus Schmidberger

Ludwig-Maximilians-Universit?t M?nchen
IBE - Institut f?r medizinische Informationsverarbeitung,
Biometrie und Epidemiologie
Marchioninistr. 15, D-81377 Muenchen
URL: http://ibe.web.med.uni-muenchen.de 
Mail: Markus.Schmidberger [at] ibe.med.uni-muenchen.de
Tel: +49 (089) 7095 - 4599

on 06/02/2008 08:18 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?
> 
> Thank you in advance!
> Federico
See ?stop and ?stopifnot

HTH,

Marc Schwartz

On 2 Jun 2008, at 15:18, 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?
>
f <- function() {
   ...
   if (1 == 1) return(WHATEVER)
   ...
   ...
   return(ONSUCCESS)
}

--Hans

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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