Try tt <- as.POSIXct("2011-01-29 15:00") tt-trunc(tt,"days")
Note that this result can be used to add or subtract from datetime values, but I don't know of a convenient way to represent it as HH:MM:SS format. "Simon Goodman" <s.j.good...@leeds.ac.uk> wrote: > >How can I extract only the time component from an POSIXlt object? > >For example if I try the following it still returns both the date and >time... > >>as.POSIXlt(tr.date[1]) >[1] "2010-10-18 21:46:53" >>as.POSIXlt(tr.date[1],"%H:%M:%S") >[1] "2010-10-18 21:46:53" > >round and trunc don't help... is there an "as.Time" equivalent to >as.Date >? > >Thanks, Simon > >-- >View this message in context: >http://r.789695.n4.nabble.com/Extract-time-only-from-POSIXlt-object-tp3246751p3246751.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. --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity. ______________________________________________ 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.