[R] Timezones

ripley@stats.ox.ac.uk ripley at stats.ox.ac.uk
Thu Mar 6 09:36:33 CET 2003


It's a Linux issue.  Solaris gives:

> Sys.time()
[1] "2003-03-06 08:27:23 GMT"
> as.POSIXlt(Sys.time(), "HST")
[1] "2003-03-05 22:27:40 HST"

which looks right to me.  Past experience suggests that Solaris's POSIX
conformance is much better than glibc's.  Since my RH7.2 box does it too,
I will look for a workaround.  (The problem seems to be in the use of
tzset, and the code of zdump may indicate how to get around this.)

Brian

On Thu, 6 Mar 2003, Adrian Trapletti wrote:

> Can anybody give me a hint why as.POSIXlt doesn't recognize the same
> timezones that zdump knows about (Linux Suse 8.1 and Suse 7.3)? Is there
> a workaround?
> 
> R : Copyright 2002, The R Development Core Team
> Version 1.6.1  (2002-11-01)
> 
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type `license()' or `licence()' for distribution details.
> 
> R is a collaborative project with many contributors.
> Type `contributors()' for more information.
> 
> Type `demo()' for some demos, `help()' for on-line help, or
> `help.start()' for a HTML browser interface to help.
> Type `q()' to quit R.
> 
> [Previously saved workspace restored]
> 
> > Sys.time()
> [1] "2003-03-06 08:20:09 CET"
> > system("zdump CET")
> CET  Thu Mar  6 08:20:14 2003 CET
> > as.POSIXlt(Sys.time(), "HST")
> [1] "2003-03-06 08:20:18 CET"
> > system("zdump HST")
> HST  Wed Mar  5 21:20:20 2003 HST
> 
> best
> Adrian
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595



More information about the R-help mailing list