The manual entry for as.POSIX says this about time zone codes... Usage as.POSIXct(x, tz = "") tz A timezone specification to be used for the conversion... but it fails to mention what these "specifications" are. So far, I have tried... as.POSIX(x, tz="UTC") ... works, gives UTC times as.POSIX(x, tz="UTC") ... works, gives EST times as.POSIX(x, tz="CST") ... does NOT work, gives UTC times How do I get Central Standard Time or the US? Anybody know what the code is? Thanks. [[alternative HTML version deleted]]
Whoops, [EDIT] as.POSIX(x, tz="UTC") ... works, gives UTC times as.POSIX(x, tz="EST") ... works, gives EST times as.POSIX(x, tz="CST") ... does NOT work, gives UTC times [/EDIT] On Mar 7, 2006, at 8:05 AM, Jason Horn wrote:> as.POSIX(x, tz="UTC") ... works, gives UTC times > as.POSIX(x, tz="UTC") ... works, gives EST times > > as.POSIX(x, tz="CST") ... does NOT work, gives UTC times[[alternative HTML version deleted]]
Only "" and "GMT" are really guaranteed to work on all systems since the time zones are system dependent but try: "CDT6CST" and see if that works on your system. On 3/7/06, Jason Horn <jhorn at bu.edu> wrote:> Whoops, > > [EDIT] > > as.POSIX(x, tz="UTC") ... works, gives UTC times > as.POSIX(x, tz="EST") ... works, gives EST times > > as.POSIX(x, tz="CST") ... does NOT work, gives UTC times > > [/EDIT] > > On Mar 7, 2006, at 8:05 AM, Jason Horn wrote: > > > as.POSIX(x, tz="UTC") ... works, gives UTC times > > as.POSIX(x, tz="UTC") ... works, gives EST times > > > > as.POSIX(x, tz="CST") ... does NOT work, gives UTC times > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >
Thank you again Gabor, that did the trick. Any thoughts on where I go go for a reference for these time codes? Where did you get "CDT6CST" from? Or is this just one of those things that is "common knowledge" in UNIX circles. To the R developers: I recommend a sentence be added to the manual for as.POSIXxx such as "vales for tz are system dependent, examples for common systems are....." Thanks! On Mar 7, 2006, at 9:00 AM, Gabor Grothendieck wrote:> Only "" and "GMT" are really guaranteed to work on all systems > since the time zones are system dependent but try: "CDT6CST" > and see if that works on your system. > > > On 3/7/06, Jason Horn <jhorn at bu.edu> wrote: >> Whoops, >> >> [EDIT] >> >> as.POSIX(x, tz="UTC") ... works, gives UTC times >> as.POSIX(x, tz="EST") ... works, gives EST times >> >> as.POSIX(x, tz="CST") ... does NOT work, gives UTC times >> >> [/EDIT] >> >> On Mar 7, 2006, at 8:05 AM, Jason Horn wrote: >> >>> as.POSIX(x, tz="UTC") ... works, gives UTC times >>> as.POSIX(x, tz="UTC") ... works, gives EST times >>> >>> as.POSIX(x, tz="CST") ... does NOT work, gives UTC times >> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at stat.math.ethz.ch mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! http://www.R-project.org/posting- >> guide.html >> >
Each OS would presumably have to document it. I personally use Windows and in that case there is some info here: http://msdn2.microsoft.com/en-us/library/90s5c885.aspx On 3/7/06, Jason Horn <jason at 109valentine.com> wrote:> Thank you again Gabor, that did the trick. Any thoughts on where I > go go for a reference for these time codes? Where did you get > "CDT6CST" from? Or is this just one of those things that is "common > knowledge" in UNIX circles. > > To the R developers: I recommend a sentence be added to the manual > for as.POSIXxx such as "vales for tz are system dependent, examples > for common systems are....." > > > > > Thanks! > > > On Mar 7, 2006, at 9:00 AM, Gabor Grothendieck wrote: > > > Only "" and "GMT" are really guaranteed to work on all systems > > since the time zones are system dependent but try: "CDT6CST" > > and see if that works on your system. > > > > > > On 3/7/06, Jason Horn <jhorn at bu.edu> wrote: > >> Whoops, > >> > >> [EDIT] > >> > >> as.POSIX(x, tz="UTC") ... works, gives UTC times > >> as.POSIX(x, tz="EST") ... works, gives EST times > >> > >> as.POSIX(x, tz="CST") ... does NOT work, gives UTC times > >> > >> [/EDIT] > >> > >> On Mar 7, 2006, at 8:05 AM, Jason Horn wrote: > >> > >>> as.POSIX(x, tz="UTC") ... works, gives UTC times > >>> as.POSIX(x, tz="UTC") ... works, gives EST times > >>> > >>> as.POSIX(x, tz="CST") ... does NOT work, gives UTC times > >> > >> > >> [[alternative HTML version deleted]] > >> > >> ______________________________________________ > >> R-help at stat.math.ethz.ch mailing list > >> https://stat.ethz.ch/mailman/listinfo/r-help > >> PLEASE do read the posting guide! http://www.R-project.org/posting- > >> guide.html > >> > > > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >