[R] Convert date/time string to date

[Prof Brian Ripley]

On Sun, 11 Jan 2009, Heston Capital wrote:

> I am new to R and am trying to import a text file that contains
> date/time and various fields.  I want to sort this matrix by date and
> also perform calculations on the date field (difference between two
> dates etc).
>
> The format of the string looks as follows:
>
> x<-c("25/2/2003 0:00:00")
>
> I tried:
>
> as.Date(x,format='%d/%m/%y')
> [1] "2020-02-25"
>
> Obviously I am doing something wrong here.  I would like to remove the

You have a 4-figure date, so need %Y not %y.  See ?strptime.

> hh:mm:ss from the end of the string if possible.
>
> Thanks for your help, I have been searching for hours and not getting anywhere.
>
> ______________________________________________
> R-help at 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.
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595