On Fri, 20 Jul 2018, William Dunlap wrote:
The problem occurs because no commonly used format works on all your date strings. If you give as.POSIXlt the format you want to use then items that don't match the format will be treated as NA's. Use is.na() to find them.
Bill, No NAs found using both is.na() and scrolling through the source file. That's why I asked for help: I saw nothing different in the dates or times. Regards, Rich ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
