On Wed, 17 Sep 2003, Martin Maechler wrote:
> >>>>> "BDR" == Prof Brian Ripley <[EMAIL PROTECTED]>
> >>>>> on Wed, 17 Sep 2003 06:58:48 +0100 (BST) writes:
>
> BDR> On Tue, 16 Sep 2003, Deepayan Sarkar wrote:
> >> Is the date class standard enough to warrant including a
> >> check for it in lattice ?
>
> BDR> I don't think so. The POSIX*t classes in R are the
> BDR> most standard, followed by the chron package and only
> BDR> then the date package.
>
> Definitely. And I think we should encourage people to
> upgrade to POSIX.t from "chron" (let alone "date") more
> strongly {Note that there have been as.POSIXct() methods for
> these classes since the beginning of the POSIX.t classes.
>
> Could "chron" and "date" users be heard about what
> functionality they are missing in POSIX.t ?
>
> On the other hand, the recommended package "survival" has
> a(nother?) class "date" and that package is based on S(plus) code
> and may hence not be convertible sensibly ?
survival has the parts of date it needs included (same class, same
original author). It has rate tables which as I understand it are in date
format and so need to accessed by date objects. I could well understand
Thomas not wanting to do a conversion.
--
Brian D. Ripley, [EMAIL PROTECTED]
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
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