[R] convert to chron objects
sean.oriordain at gmail.com
Thu Jul 14 06:38:16 CEST 2005
are those dates in m/d/y or d/m/y ?
?chron and watch out for
format = c(dates = "d/m/y", times = "h:m:s")
On 13/07/05, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> [I had some emails problems so I am sending this again. Sorry
> if you get it twice.]
> On 7/13/05, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> > On 7/13/05, Young Cho <iidn01 at yahoo.com> wrote:
> > > Hi,
> > >
> > > I have a column of a dataframe which has time stamps
> > > like:
> > >
> > > > eh$t
> > >  06/05/2005 01:15:25
> > >
> > > and was wondering how to convert it to chron variable.
> > > Thanks a lot.
> Try this:
> # test data frame eh containing a factor variable t
> eh <- data.frame(t = c("06/05/2005 01:15:25", "06/07/2005 01:15:25"))
> # substring converts factor to character and extracts substring
> chron(dates = substring(eh$t, 1, 10), times = substring(eh$t, 12))
> See ?chron for more info. There is an article on dates in
> R News 4/1 and although it does not specifically answer this
> question it may be useful with chron and also provides a
> reference to more chron info elsewhere.
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