On Nov 16, 2010, at 10:58 AM, Aleksey Naumov wrote:
Hi R experts,
I am looking for a simple error handling approach, whereby I could
stop
function execution with a customized error message. For example:
for (i in 1:10) {
if (i == 5){
#Then insert:
cat("Informative error message") ; break() }
# I'd like to be able to stop right here with an error message
I have
complete control over
}
I think "stop right here" is ambiguous. Are you at a terminal session
or inside a script or function? Do you want to call a debugger?
And if you were inside a function then just cat("message"); return()
The problem with stop() is that I cannot control completely what gets
printed to the terminal, even with stop(call.=FALSE) there is the
"Error:"
string. I've worked through examples (whatever few there are) for
try() and
tryCatch() and I still cannot understand how to do this. If I supply
my own
error handler function with tryCatch(..., error=function(e) ...) I can
control the error message, but the loop continues on to i=6, etc.
So I am struggling with error handling in R... It' seems its a lot
simpler
and more consistent e.g. in Python.
Any help would be greatly appreciated!
Aleksey
[[alternative HTML version deleted]]
David Winsemius, MD
West Hartford, CT
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