Re: [Rd] chron vs. POSIX

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Sat 15 Jul 2006 - 01:02:27 GMT

On 7/14/2006 3:38 PM, Sebastian Luque wrote:
> Hi,
>
> One of the big decisions when writing code is how to handle dates and
> times. Gabor Grothendieck provided an excellent overview of the issue in
> his R News 4/1 (2004) article, and many users and developers are probably
> using it as a guide. The proposed guideline is to use the simplest class
> required; as Gabor put it "use Date if possible, otherwise use chron, and
> otherwise use POSIX".
>
> This seems to me a very efficient strategy, judging from my own
> experiences and those of others users. All but the simplest calculations
> with POSIX objects demand great care, due to time zone and and daylight
> savings considerations. Therefore, I've always chosen chron for
> relatively complex projects, where I don't need to deal with time zones or
> daylight savings problems. The ease with which objects can be switched
> from numeric to chron representations is a major advantage IMHO¹.
>
> If Gabor's recommendations are to be followed, wouldn't it make sense to
> include chron in base R? Given that flexibility for handling time
> variables is so fundamental, the addition of chron to base R would provide
> users everything they need to work with time, without the need to rely on
> an external package. What do others think?

Putting something into base R essentially means that it is to be taken over by R core. I think chron is being adequately maintained now (the R maintainer is already a member of R core), so I don't see a need for that.

I don't see a problem having a package on CRAN. If it's a good package and people realize that it's good, and it remains available for others to use, then what problem is being solved?

Duncan Murdoch



R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Sat Jul 15 11:11:44 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Sat 15 Jul 2006 - 18:23:58 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.