From spencer.graves at structuremonitoring.com  Thu Aug 19 18:15:46 2010
From: spencer.graves at structuremonitoring.com (Spencer Graves)
Date: Thu, 19 Aug 2010 09:15:46 -0700
Subject: [Rd] c.POSIXct
In-Reply-To: <AANLkTi=1gu4hhky1a4+ifgi6S15VvHZ=SPnpquWavxfk@mail.gmail.com>
References: <AANLkTinGcXRQd5+Xmo2ad5HoofdbzhZbEaSznAgCL3vO@mail.gmail.com>
	<AANLkTin=8k4UfBqzjQmHa9ntQP3V9zhuhsfkL_qzZyWi@mail.gmail.com>
	<D611103AA7EE3B4DAE7F7D49C72B291A02C7E497@EXMAIL2.bocad.bank-banque-canada.ca>
	<AANLkTi=m2Ti5bWVGMT=RH0xA7WF=A=1cf1jZrNjcJs9Z@mail.gmail.com>
	<4C6D5135.5010105@structuremonitoring.com>
	<AANLkTi=1gu4hhky1a4+ifgi6S15VvHZ=SPnpquWavxfk@mail.gmail.com>
Message-ID: <4C6D58B2.7090906@structuremonitoring.com>

  Hi, Gabor, et al.:


       I'm suggesting adding "checkAttributes" to "ca", NOT to "c".


       Spencer


On 8/19/2010 8:50 AM, Gabor Grothendieck wrote:
> 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.
>


-- 
Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San Jos?, CA 95126
ph:  408-655-4567



[Rd] c.POSIXct
Spencer Graves