[R] formating chron date times for printing

[stephen sefick]

Thank you both!  If I don't want to deal with a Time Zone potentailly
converting some of the dates, which would be your suggestions.  Or,
are they all the same way to skin a cat.  Again thank you for your
wonderful help.
kindest regards,

Stephen Sefick


On Tue, Jun 29, 2010 at 1:39 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> On Tue, Jun 29, 2010 at 2:22 PM, Gabor Grothendieck
> <ggrothendieck at gmail.com> wrote:
>> On Tue, Jun 29, 2010 at 2:01 PM, stephen sefick <ssefick at gmail.com> wrote:
>>> the date were created with chron with this argument
>>>
>>> format=c(dates="Y/m/d", times="H:M:S"))
>>>
>>> so I have the dates being displayed as
>>>
>>> (10/06/22 12:00:00)
>>>
>>> I would like to have them displayed as
>>>
>>> "2010-06-22 12:00:00" or "%Y-%m-%d %H:%M:%S"
>>>
>>> and then I can convert these for mergeing with another data frame
>>>
>>> x <- (structure(c(14464, 14464.0104166667, 14464.0208333333, 14464.03125,
>>> 14464.0416666667), format = structure(c("Y/m/d", "H:M:S"), .Names = c("dates",
>>> "times")), origin = c(1, 1, 1970), class = c("chron", "dates",
>>> "times")))
>>>
>>> reading through old posts I found this:
>>>
>>> format(x, enclosed = c("", ""))
>>>
>>> which put the which surrounds the date time with "" instead of ()
>>> now I would like to change the format of the dates to print like the
>>> above specified.
>>> kindest regards,
>>>
>>
>> Try this:
>>
>>> format(as.POSIXlt(x, tz = "GMT"))
>> [1] "2009-08-08 00:00:00" "2009-08-08 00:15:00" "2009-08-08 00:29:59"
>> [4] "2009-08-08 00:45:00" "2009-08-08 01:00:00"
>>
>
> Also here is another solution:
>
>> paste(as.Date(x), format(x - floor(x)))
> [1] "2009-08-08 00:00:00" "2009-08-08 00:15:00" "2009-08-08 00:30:00"
> [4] "2009-08-08 00:45:00" "2009-08-08 01:00:00"
>



-- 
Stephen Sefick
____________________________________
| Auburn University                                   |
| Department of Biological Sciences           |
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|___________________________________|

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