[R] How to *completely* stop a script after stop()?

[Ista Zahn]

Hi Carl,
If you wrap the whole script in brackets the script will not proceed
past the stop() function:

{
for(i in 1:10){

       print(i)
       if(i == 5) stop("i == 5")


}
for(i in 11:100) print(i)
}

best,
Ista

On Sat, Jan 15, 2011 at 4:29 PM, Carl Witthoft <carl at witthoft.com> wrote:
>
> Somehow this reminds me of a famous FORTRAN code snippet:
>
> 10 STOP
> STOP
> STOP
> ! IN CASE STILL SKIDDING
> GOTO 10
>
>
>
> <quote>
> From: Marius Hofert <m_hofert_at_web.de>
> Date: Sat, 15 Jan 2011 09:09:20 +0100
>
>
> Dear expeRts,
>
> is there a neat way to *completely* stop a script after an error occured?
> For example, consider the following script:
>
> ## ==== file.R ====
>
> for(i in 1:10){
>
>        print(i)
>        if(i == 5) stop("i == 5")
>
>
> }
> for(i in 11:100) print(i)
>
> ## ================
>
>
> stop() behaves like it should namely to stop the execution of the *current*
> expression, but I was wondering if it is possible to *really* stop the
> script after the first for loop [so without executing the second for loop or
> anything after that point]. Of course one could use something like "if(there
> was an error) do not continue" but that's not really nice.
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org