[R] tracing the origin of warning messages

[Uwe Ligges]

Use options(warn=2)

Uwe Ligges


On 03.05.2010 08:55, Thomas Wutzler wrote:
> Dear R Users,
>
> what is the best way to trace the origin of warning messages?
>
> 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?
>
> 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.
>
> (using Windows XP, R version 2.10.1)
>
> Best regards
> Thomas Wutzler
>
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