Message-ID: <f8e6ff050809110802y712e4218qef1ae1fd47d1f4bc@mail.gmail.com>
Date: 2008-09-11T15:02:51Z
From: Hadley Wickham
Subject: Truncating dates (and other date-time manipulations)
Dear all,
I've been struggling to perform common operations on dates that I need
to be able to correct draw date-time scales - in particular I need to
be able to round/truncate/ceiling dates to arbitrary precision - e.g.
to weeks, months or years (or multiples thereof). I haven't been able
to find anything to do this in base R (trunc.Date only truncates to
sub-day units), or in the date related contributed packages I've
looked in (e.g. chron). Have I missed something?
Otherwise, I have been working on a bottom up set of functions to make
date manipulation easier - http://gist.github.com/10238. These should
work for all date-time types and I've tried to use a consistent naming
scheme and consistent output conventions. This seems like a rather
small bundle of functions to be worth turning into a package, so I was
wondering if anyone would be interested in adopting them into an
existing date-time related package.
Regards,
Hadley
--
http://had.co.nz/