> Date: Mon, 14 Feb 2011 00:55:12 -0800
> From: jon_d_co...@yahoo.co.uk
> To: r-help@r-project.org
> Subject: [R] how to order POSIXt objects ?
>
>
> I have a problem ordering by descending magnitude a POSIXt object. Can
> som
a) POSIXt represents the idea of a datetime. POSIXct is a compact
representation (number of seconds since 1970-01-01 00:00:00 GMT) of this
idea. POSIXlt is an inefficient but convenient representation (using
nine separate components) of this idea. Either POSIXct or POSIXlt may be
treated as a P
Thanks. I did not even know about that function; will have to use it
in the future. That is the good news/bad news about R; so many
things to learn about.
On Mon, Feb 14, 2011 at 11:58 AM, Prof Brian Ripley
wrote:
> See the help page for order. It has a similar example, and the general
> solu
See the help page for order. It has a similar example, and the
general solution is to use xtfrm, not unclass.
On Mon, 14 Feb 2011, jim holtman wrote:
'unclass' it first(assuming that it is POSIXct)
-unclass(mytime)
On Mon, Feb 14, 2011 at 3:55 AM, JonC wrote:
I have a problem ordering by
It's a bit better to use xtfrm.
Hadley
On Monday, February 14, 2011, jim holtman wrote:
> 'unclass' it first(assuming that it is POSIXct)
>
> -unclass(mytime)
>
> On Mon, Feb 14, 2011 at 3:55 AM, JonC wrote:
>>
>> I have a problem ordering by descending magnitude a POSIXt object. Can
>> someone
'unclass' it first(assuming that it is POSIXct)
-unclass(mytime)
On Mon, Feb 14, 2011 at 3:55 AM, JonC wrote:
>
> I have a problem ordering by descending magnitude a POSIXt object. Can
> someone help please and let me know how to work around this. My goal is to
> be able to order my data by DATE
I have a problem ordering by descending magnitude a POSIXt object. Can
someone help please and let me know how to work around this. My goal is to
be able to order my data by DATE and then by descending TIME.
I have tried to include as much info as possible below. The problem stems
from trying to
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