On Oct 3, 2012, at 11:00 AM, Santosh wrote:
> Dear Rxperts,
> Was wondering if there is any function in R similar to
> options("time.zone"): found in S-Plus that can help in looking at the
> default timezone settings..
Many of us have no way to understand questions based on analogies with S. Are
you asking how to see the current TZ?
> attr(as.POSIXlt(Sys.time()), "tzone" )
[1] "" "PST" "PDT"
Your timezone is handled by your OS (and the printed output is handled by
print.POSIXct, which has options for converting to other TZs). From the
timezones help page:
"Note that except on Windows, the operation of time zones is an OS service, and
even on Windows a third-party database is used and can be updated (see the
section on ‘Time zone names’)."
Or are you asking where to find the range of possible values?
This is the first example in the help page for
?timezones
zfile <- "/usr/share/zoneinfo/zone.tab"
tzones <- read.delim(tzfile, row.names = NULL, header = FALSE,
col.names = c("country", "coords", "name", "comments"),
as.is = TRUE, fill = TRUE, comment.char = "#")
str(tzones$name)
chr [1:410] "Europe/Andorra" "Asia/Dubai" "Asia/Kabul" "America/Antigua"
"America/Anguilla" ...
--
David Winsemius, MD
Alameda, CA, USA
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