Use something like format(as.POSIXct(xxx, format = "STRING"), format = "STRING2")
where the appropriate formatting codes can be worked out using the info in ?strptime Cheers, Michael On Mon, Oct 15, 2012 at 9:32 PM, york8866 <yu_y...@hotmail.com> wrote: > Dear all, > > I have a series of time variables such as: > > 04MAY2011:08:19:00 > 01JUN2011:09:44:00 > 28JUN2011:08:08:00 > 25JUL2011:07:44:00 > > > How could I extract the time as a number, so that I can normalize the times > by the first time variable? > > Thanks, > > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/time-extraction-and-normalization-tp4646275.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. ______________________________________________ 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.