[R] R 2.9.0 plot still forcing current time zone

[jim holtman]

Try this: set the timezone to what you want before plotting:

> tzsave <- Sys.getenv("TZ")  # save current
> Sys.setenv(TZ="GMT")  # set to whatever
>  plot(x,rep(1,11))  # plot
> Sys.setenv(TZ=tzsave)  # restore
>  plot(x,rep(1,11))  # plot in original time zone


On Wed, Jul 8, 2009 at 2:21 AM, Britton Stephens<stephens at ucar.edu> wrote:
> the help page for plot.POSIXct says
>
> "As from R 2.9.0 the date-times for a '"POSIXct"' input are
>    interpreted in the timwzonw give by the '"tzone"' attribute it
>    there is one, otherwise the current timezone.  (Earlier vrsions
>    always used the current timezone.)"
>
> however I am using 2.9.0 on linux and the following still happily produces
> an x-axis in local (MDT) time
>
>> x=strptime(paste('09-01-01 00:00:00',sep=''),format='%y-%m-%d
>> %H:%M:%S',tz="GMT")+60*60*24*(seq(0.5,1.5,.1))
>> x
> [1] "2009-01-01 12:00:00 GMT" "2009-01-01 14:24:00 GMT"
> [3] "2009-01-01 16:48:00 GMT" "2009-01-01 19:12:00 GMT"
> [5] "2009-01-01 21:36:00 GMT" "2009-01-02 00:00:00 GMT"
> [7] "2009-01-02 02:24:00 GMT" "2009-01-02 04:48:00 GMT"
> [9] "2009-01-02 07:12:00 GMT" "2009-01-02 09:36:00 GMT"
> [11] "2009-01-02 12:00:00 GMT"
>> attributes(x)
> $class
> [1] "POSIXt"  "POSIXct"
>
> $tzone
> [1] "GMT"
>
>> plot(x,rep(1,11))
>
> Is this a bug, or am I missing something?  Thanks a lot!
> Britt
>
> --
> Britton B. Stephens
> National Center for Atmospheric Research
> P.O. Box 3000, 1850 Table Mesa Drive
> Boulder, CO  80307-3000
> Phone: (303) 497-1018
> Fax: (303) 497-1092
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?