On Mon, 3 May 2010, Thomas Wutzler wrote:
Dear R Users,
what is the best way to trace the origin of warning messages?
options(warn=2)
at least for the first warning.
If an error occurs I can use traceback() to see where it comes from. I
would like to do similar investigation, where a warning message
originates from.
Is there an option to turn warnings to errors?
Yes: did you not find it under ?options ?
I tried the following
fWarn <- function(){ warning("A") }
options(warning.expression = stop())
fWarn()
traceback()
2: stop()
1: options(warning.expression = stop())
Hence, it does not give me the desired stack trace and the information
that the warning occured in function fWarn, so far.
So print something useful there like the call stack, see ?sys.call.
(using Windows XP, R version 2.10.1)
Best regards
Thomas Wutzler
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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