What OS are you using? It makes a difference.
---------------------------------------------------------------------------
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.
