Thank you Hadley & John Hadley's approach below is the kind of thing I was expecting-- I'd just never managed to figure out how to use tryCatch. John has also made me think that I could probably patch things up by modifying my calls to 'try'-- because sometimes I do want to print the error messages from the 'try's, it just depends on what they are. On balance, it's probably time for me to get to get to grips with 'tryCatch'.
Thanks again mark -- Mark Bravington CSIRO Mathematical & Information Sciences Marine Laboratory Castray Esplanade Hobart 7001 TAS ph (+61) 3 6232 5118 fax (+61) 3 6232 5012 mob (+61) 438 315 623 -----Original Message----- From: hadley wickham [mailto:[EMAIL PROTECTED] Sent: Tuesday, 11 November 2008 2:20 PM To: Bravington, Mark (CMIS, Hobart) Cc: R-help@r-project.org Subject: Re: [R] how to stop without error message? > > I should have been clearer, sorry-- I'm trying to exit from an "inner" > function which might be several levels deep, returning straight to the R > prompt. To be specific, I'm trying to clean up the "No Error in..." message > in my 'debug' package-- the "No " prefix being my original workaround to > avoid an unnecessarily alarming message. Ah, ok. How about signalling custom condition then? f <- function() { print("a") g() print("d") } g <- function() { print("b") error <- simpleError("") class(error) <- c("myerror", class(error)) signalCondition(error) print("c") } f() tryCatch(f(), myerror = function(...) print("stopped!")) Hadley -- http://had.co.nz/ ______________________________________________ R-help@r-project.org 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.
