I would have suggested "US/Central", by analogy with "US/Pacific" which I use on my unix-like Mac OS X 10.3.9 system. I don't know what might be "common knowledge" in UNIX circles, but here's a bit of information from my system.
It has a directory named /usr/share/zoneinfo. zoneinfo[166]% pwd /usr/share/zoneinfo zoneinfo[167]% ls | grep DT CST6CDT EST5EDT MST7MDT PST8PDT There are files named GMT, UTC, GB, and a number of others. There are numerous subdirectories, including for example, "Asia", "Australia", "Europe", "US". zoneinfo[168]% cd US US[169]% ls ./ Aleutian East-Indiana Indiana-Starke Pacific ../ Arizona Eastern Michigan Pacific-New Alaska Central Hawaii Mountain Samoa This suggests to me that valid values for the tz argument are relative paths to files /usr/share/zoneinfo, but I don't know that for a fact. -Don At 9:22 AM -0500 3/7/06, Jason Horn 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 <[EMAIL PROTECTED]> 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@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@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 -- -------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA ______________________________________________ R-help@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
