On 02/03/2012 02:49 AM, Titus von der Malsburg wrote:
Dear list!
I have a script that processes a large number of data files. When one
file fails to process correctly, I want the script to write a message
and to continue with the next file. I achieved this with tryCatch:
for (f in files)
tryCatch({heavy.lifting(f)}, error=function(e) log.error.to.file(e))
I also want to log warning messages and tried something like this:
for (f in files)
tryCatch({heavy.lifting(f)},
warning=function(w) {log.warning.to.file(w)},
error=function(e) {log.error.to.file(e)})
Unfortunately, this aborts processing when a warning is generated. My
question: how can I resume processing after I logged the warning as if
nothing had happened? My understanding of the man page is that his is
not possible with tryCatch but I'm not sure.
Hi Titus -- use withCallingHandlers to capture the warning, and
invokeRestart() to continue after handling it.
withCallingHandlers({
warning('oops')
message('continuing')
}, warning=function(w) {
message('handling: ', conditionMessage(w))
invokeRestart("muffleWarning")
})
Thanks for any suggestions!
Titus
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