Great! Thank you!
I think the function with the C-like function should do the trick. On Tue, Aug 12, 2014 at 4:31 PM, John McKown <john.archie.mck...@gmail.com> wrote: > On Tue, Aug 12, 2014 at 3:23 PM, William Dunlap <wdun...@tibco.com> wrote: > >> > Again, in my opinion, all time date should be recorded in GMT. >> >> It depends on context. If you are studying traffic flow or >> electricity usage, then you want local time with all its warts >> (perhaps stated as time since 3am so any daylight savings time >> problems are confined to a small portion of the data), perhaps along >> with time since sunrise and time since sunset. >> > > I see your point. But if my data is in GMT, that is a unique timestamp > value. And, given that, along with location information, I should then be > able to generate a local time for "human activity". E.g. when do people go > to lunch? Another plus of this is that there is no confusion during "fall > back" whether this is the 1st or 2nd instance of something like 02:27:00. > Long ago, I worked for a city government. The recorded everything on the > machine in local time. Including police log entries. Always made me wonder > why some lawyer didn't have a nice window of confusion if something > allegedly happened on time change day and was logged as 02:30:00. > > >> >> If you are studying astronomy, then UTC is appropropriate. >> >> >> Bill Dunlap >> TIBCO Software >> wdunlap tibco.com >> >> > -- > There is nothing more pleasant than traveling and meeting new people! > Genghis Khan > > Maranatha! <>< > John McKown > -- Erin Hodgess Associate Professor Department of Mathematical and Statistics University of Houston - Downtown mailto: erinm.hodg...@gmail.com [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.