On Jun 15, 2010, at 7:45 AM, PtitBleu wrote:
Hello, In one of my functions, I need to extract the hour from a date. For example: as.POSIXlt("2010-03-27 02:00:00")$hour gives 2 as expected.It works for all the dates I've tested except the following one which is inmy list of dates: as.POSIXlt("2010-03-28 02:00:00")$hour which gives 0. I don't understand why it doesn't work with this particular date.
It "works" for me with a result of 2, so I suspect it has something to do with whether that hour even "exists" during the shift from "ordinary" time to daylight savings time in your LOCALE (which was not offered but would be plausibly near GMT/UMT given the domain from which you are posting).
Any idea ? Thanks in advance, Ptit Bleu (with R 2.9.0 under Windows ). ...
... wrong info for this question, I suspect. -- David Winsemius, MD West Hartford, CT ______________________________________________ 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.
