[Rd] Extract/format/show for S4 objects
jhibschman at gmail.com
Wed Jun 9 16:09:19 CEST 2010
Gabor Grothendieck <ggrothendieck at gmail.com> writes:
> The yearqtr class already rounds off automatically to avoid floating
> point effects and handles #1 and #2.
The main use for all this was so I could use quarters as index columns
with data.table, which demands integer storage mode. (This is part of
my ongoing attempt to reinvent q/kdb+ in R.)
I've had some problems with yearmon's conversions in the past, so I'm
(probably unfairly) suspicious of the approach of storing dates as
floats. To be fair, once I reported the bug, it was fixed almost
immediately; I was very impressed.
> On the other hand if you are just interested in playing around with S4
> for its own sake review the source code of the mondate package as an
> example of an S4 based date package.
Thanks, that's a very useful example. I don't understand all of what's
going on in there, but I find it easier to understand the documentation
with an example in hand.
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