Hello, I am working under R2.11.0 Windows and I would like to ask you if you know a way to save all warning messages obtained by the R function "warning" in a file and keeping the functionalities of the base-function warning. For example if I use external code, I don't want to replace all lines containing "warning(...)" by a selfwritten function. I want to execute it normally and everytime the external code makes a call to warning, I want the warnings message printed out in the console AND written in a file.
My first solution is to redefine the function warning in the global environment such as: warning <- function(...){ write(...,"Warning.log",append=TRUE) base::warning(...) #unfortunately the warning happens always in the function warning of the .GlobalEnv #and doesn't indicate anymore where the error happens :-( } This solution isn't very clean. I would like to try to redefine "warning.expression" in options. In last case, I don't understand how the passing of arguments works. I would like to do something like: options(warning.expression=quote({ write(...,"Warning.log",append=TRUE) ????? })) I put the ???? because I don't know how I should call the function warning without being recursive and how I can pas arguments. Thank you Alexander -- View this message in context: http://r.789695.n4.nabble.com/Print-warning-messages-and-save-them-automatically-in-a-file-tp4570163p4570163.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.