> On 18 Feb 2015, at 18:45 , Troels Ring <tr...@gvdnet.dk> wrote: > > dear friends - sorry to ask another simple question - > I have dates set up as this: > dates #[1] 2003-01-21 01:08:00 > > To handle it I did > as.POSIXlt(dates) "2003-01-21 01:08:00 CET" > > but noticed that during write.table it was apparently better to take it > further > as.numeric(as.POSIXct(as.POSIXlt(dates)) 1043107680 > > And this works fine for modeling but now I would like to have it back as > POSIXlt > as.POSIXlt requires an origin, if I'm right. > So how is it done?
Like this? > as.POSIXlt(1043107680, origin='1970-1-1') [1] "2003-01-21 01:08:00 CET" (Time zones may require special care, though.) -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ 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.
