On Tue, Jul 12, 2011 at 8:57 AM, B Laura <gm.spam2...@gmail.com> wrote: > Dear Gabor > > http://rwiki.sciviews.org/doku.php?id=tips:data-io:ms_windows&s=excel > doesnt describe handling dates with daylight saving time issues. >
Two references were given and its discussed in the R News article. It was also mentioned over again in my first post -- namely, don't use POSIXct and then you don't have time zones and so all these problems go away. > R classes Date can remove time and timezone, however calculating days You don't have to remove the time zone if you never use POSIXct. Date class has no time zones in the first place. > difference between two manipulated variables same problem appear if handling > these without Dates. > > R News 4/1 doesnt provide solution to this neither. It certainly discusses how to choose the appropriate date / time class. Your problem is that you are using the wrong class for the problem whereas you seem to be interpreting it as how to fix it up after having chosen the wrong class. By that time the wrong design decision has already been made and that is what is fundamentally causing the problem. The entire first page of the Rnews article discusses choosing the right class in the first place. -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ 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.
