I see this discontinuity at '2010-04-04 02:26:05' on my Windows 7 x64 with R
2.15.2. I also see it for time zone "America_Los_Angeles" at '2010-11-07
01:23:09'.
I am not entirely sure what the "correct" behavior should be, since the string
does not specify whether it is in daylight or standard time, even though it
could be either for any time between 2:00 and 3:00 (or 1:00 and 2:00 for
"America/Los_Angeles").
In any event, if this is an issue it appears to be an Olsen timezone database
issue, not an R issue.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
Andrew Digby <andrewdi...@mac.com> wrote:
>
>Apologies - I intended to add that info at the end: OS X 10.8.2 and R
>2.15.1.
>
>Many thanks.
>
>> R.Version()
>$platform
>[1] "x86_64-apple-darwin9.8.0"
>$arch
>[1] "x86_64"
>$os
>[1] "darwin9.8.0"
>$system
>[1] "x86_64, darwin9.8.0"
>$status
>[1] ""
>$major
>[1] "2"
>$minor
>[1] "15.1"
>$year
>[1] "2012"
>$month
>[1] "06"
>$day
>[1] "22"
>$`svn rev`
>[1] "59600"
>$language
>[1] "R"
>$version.string
>[1] "R version 2.15.1 (2012-06-22)"
>$nickname
>[1] "Roasted Marshmallows"
>
>
>On 7/12/2012, at 04:29 , Uwe Ligges <lig...@statistik.tu-dortmund.de>
>wrote:
>
>>
>>
>> On 06.12.2012 15:54, Jeff Newmiller wrote:
>>> What OS are you using? It makes a difference.
>>
>> ... and R version.
>>
>> Uwe Ligges
>>
>>>
>---------------------------------------------------------------------------
>>> Jeff Newmiller The ..... ..... Go
>Live...
>>> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#.
>Live Go...
>>> Live: OO#.. Dead: OO#..
>Playing
>>> Research Engineer (Solar/Batteries O.O#. #.O#.
>with
>>> /Software/Embedded Controllers) .OO#. .OO#.
>rocks...1k
>>>
>---------------------------------------------------------------------------
>>> Sent from my phone. Please excuse my brevity.
>>>
>>> Andrew Digby <andrewdi...@mac.com> wrote:
>>>
>>>>
>>>> Can anyone please shed any light on why R DateTimeClasses give
>weird
>>>> times for when daylight saving time information changes, and which
>>>> aren't consistent with the OS?
>>>>
>>>> Example:
>>>>
>>>> Expected result: in New Zealand DST stopped (NZDT -> NZST) at
>03:00
>>>> NZDT on 2010-04-04, as confirmed by the OS time zone info (OS X
>>>> 10.8.2):
>>>>
>>>> zdump -v /etc/localtime
>>>> /etc/localtime Sat Apr 3 13:59:59 2010 UTC = Sun Apr 4
>02:59:59
>>>> 2010 NZDT isdst=1
>>>> /etc/localtime Sat Apr 3 14:00:00 2010 UTC = Sun Apr 4
>02:00:00
>>>> 2010 NZST isdst=0
>>>>
>>>> Result in R: R has DST changing at 02:26:08, instead of 03:00!
>>>>
>>>> > a<-as.POSIXlt('2010-04-04 02:26:07',tz="NZ")
>>>> > a$isdst
>>>> [1] 1
>>>> > b<-as.POSIXlt('2010-04-04 02:26:08',tz="NZ")
>>>> > b$isdst
>>>> [1] 0
>>>>
>>>>
>>>> So does R get its DST information from somewhere else? Any
>suggestions
>>>> would be much appreciated!
>>>>
>>>> Thanks
>>>>
>>>> [[alternative HTML version deleted]]
>>>>
>>>> ______________________________________________
>>>> R-help@r-project.org mailing list
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide
>>>> http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
