How about this:
test <- function(x) log(x)
tryCatch({
#Code that will error
test("a")
}, finally = {
sink(stderr())
traceback()
sink()
})
If you are running non-interactively, invoke R with the --interactive
flag to force it. Saving the code above to test.R, you can see the
effect with
$ R --interactive < test.R 1> test.out 2> test.err
This seems reasonable, but maybe others will say if I'm missing
something more automagic.
-Matt
On Sun, 2010-08-22 at 11:58 -0400, ivo welch wrote:
> yes, thank you. is it possible to have it invoked to STDERR
> automatically on a program abort?
>
> /iaw
>
> On Sun, Aug 22, 2010 at 11:50 AM, Matt Shotwell <[email protected]> wrote:
> > On Sun, 2010-08-22 at 11:41 -0400, ivo welch wrote:
> >> Dear R Wizards---is it possible to get R to show its current call
> >> stack (sys.calls()) upon an error abort? I don't use ESS for
> >> execution, and it is often not obvious how to locate how I triggered
> >> an error in an R internal function. Seeing the call stack would make
> >> this easier. (right now, I sprinkle "cat" statements everywhere, just
> >> to locate the line where the error appears.) Of course, I would
> >> really love to see the line in my program that triggered this, but I
> >> have asked this before, and I understand this is too difficult to get
> >> into the R language.
> >
> > The traceback() function will print out the call stack after an error.
> > However, you may find the debug() family of functions more useful for
> > debugging. Also see the browser() function.
> >
> > -Matt
> >
> >>
> >> regards,
> >>
> >> /iaw
> >>
> >> ----
> >> Ivo Welch ([email protected], [email protected])
> >>
> >> ______________________________________________
> >> [email protected] 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.
> >
> > --
> > Matthew S. Shotwell
> > Graduate Student
> > Division of Biostatistics and Epidemiology
> > Medical University of South Carolina
> >
> >
--
Matthew S. Shotwell
Graduate Student
Division of Biostatistics and Epidemiology
Medical University of South Carolina
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
