From ggrothendieck at gmail.com  Thu Aug 19 17:50:33 2010
From: ggrothendieck at gmail.com (Gabor Grothendieck)
Date: Thu, 19 Aug 2010 11:50:33 -0400
Subject: [Rd] c.POSIXct
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On Thu, Aug 19, 2010 at 11:43 AM, Spencer Graves
<spencer.graves at structuremonitoring.com> wrote:
> ?Hi, Gabor, Paul, et al.:
>
>
> ? ? ?For classes that did not supply a "ca" method, I'd rather see the
> default being to start with the corresponding ?"c" method followed by an
> effort to preserve attributes to the maximum extent feasible. ?I'm not sure
> the best defaults, but at the moment, I would expect that attributes like
> "dim" and "dimnames" should always be dropped. ?The current default "c"
> method preserves "names" appropriately.
>
>
> ? ? ?What do you think about including another argument to
> "checkAttributes"? ?I'm not sure what the options should be nor what should
> be the default, but one option should throw and error if any contradiction
> was found while another would take all attributes from the first argument
> and ignore others.
>
>

I think ca is easier to use.  It would work consistently and simply
across classes whereas fixing up c with checkAttribues is harder to
use.



[Rd] c.POSIXct
Gabor Grothendieck