Re: [R] convert to chron objects

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Thu 14 Jul 2005 - 07:10:51 EST

[I had some emails problems so I am sending this again. Sorry if you get it twice.]

On 7/13/05, Gabor Grothendieck <ggrothendieck@gmail.com> wrote:
>
>
> On 7/13/05, Young Cho <iidn01@yahoo.com> wrote:
> > Hi,
> >
> > I have a column of a dataframe which has time stamps
> > like:
> >
> > > eh$t[1]
> > [1] 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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