Dan, This is probably an issue with the start/end of daylight saving time in your timezone.
Best, -- Joshua Ulrich | FOSS Trading: www.fosstrading.com On Fri, Sep 23, 2011 at 7:38 AM, G See <gsee...@gmail.com> wrote: > hmmm. > > I'm using xts_0.8-3 revision 602 on R-Forge, and it *almost* works for me, > but the time is off by an hour > >> xts(1, order.by=strptime("04/05/87 2:00",format="%m/%d/%y %H:%M")) > [,1] > 1987-04-05 01:00:00 1 >> > > -Garrett > > On Fri, Sep 23, 2011 at 7:33 AM, Dan Potter <arsanalyt...@gmail.com> wrote: > >> Thank you Wolfgang. On my machine sessionInfo shows I am using xts >> version 0.8-2 - >> I think it is the latest one, see >> http://cran.r-project.org/web/packages/xts/index.html >> Maybe someone can confirm correct operation in 0.8-2. Could this be a >> Revo/base R version issue? >> >> > sessionInfo() >> R version 2.12.2 (2011-02-25) >> Platform: i386-pc-mingw32/i386 (32-bit) >> >> locale: >> [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United >> States.1252 LC_MONETARY=English_United States.1252 >> [4] LC_NUMERIC=C LC_TIME=English_United >> States.1252 >> >> attached base packages: >> [1] stats graphics grDevices utils datasets methods base >> >> other attached packages: >> [1] dplR_1.4.7 xts_0.8-2 zoo_1.7-2 Revobase_4.3.0 >> RevoMods_4.3.0 RevoScaleR_1.2-0 lattice_0.19-23 >> >> >> On Fri, Sep 23, 2011 at 8:15 AM, Wolfgang Wu <wobw...@yahoo.de> wrote: >> > >> > Hmmm works fine for me. >> > >> > xts(1, order.by = strptime("04/05/87 2:00",format="%m/%d/%y %H:%M")) >> > >> > [,1] >> > 1987-04-05 02:00:00 1 >> > >> > Maybe an old version of xts? I am using xts version 0.8-0. (you can check >> that with sessionInfo().) >> > >> > Regards, >> > >> > Wolfgang Wu >> > >> > >> > >> > >> > ----- Ursprüngliche Message ----- >> > Von: Dan Potter <arsanalyt...@gmail.com> >> > An: r-sig-finance@r-project.org >> > Cc: >> > Gesendet: 12:51 Freitag, 23.September 2011 >> > Betreff: [R-SIG-Finance] xts NA date for >> > >> > Hello All, >> > I am new to R and having an issue with xts when I try and used it with >> > certain dates and times in 1987. >> > >> > Example >> > >> > > # This date and time works >> > > xts(1, order.by = strptime("04/05/87 12:00",format="%m/%d/%y %H:%M")) >> > [,1] >> > 1987-04-05 12:00:00 1 >> > >> > # This date and time do not work >> > > xts(1, order.by = strptime("04/05/87 2:00",format="%m/%d/%y %H:%M")) >> > [,1] >> > <NA> 1 >> > >> > I don't think the issue is with strptime since it seems to work fine >> > on the offending date and time, i.e. >> > > strptime("04/05/87 02:00",format="%m/%d/%y %H:%M") >> > [1] "1987-04-05 02:00:00" >> > >> > Any suggestion or work arounds would be appreciated. >> > >> > Thanks, >> > Dan >> > >> > _______________________________________________ >> > R-SIG-Finance@r-project.org mailing list >> > https://stat.ethz.ch/mailman/listinfo/r-sig-finance >> > -- Subscriber-posting only. If you want to post, subscribe first. >> > -- Also note that this is not the r-help list where general R questions >> should go. >> > >> >> _______________________________________________ >> R-SIG-Finance@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-sig-finance >> -- Subscriber-posting only. If you want to post, subscribe first. >> -- Also note that this is not the r-help list where general R questions >> should go. >> > > [[alternative HTML version deleted]] > > > _______________________________________________ > R-SIG-Finance@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-sig-finance > -- Subscriber-posting only. If you want to post, subscribe first. > -- Also note that this is not the r-help list where general R questions > should go. > _______________________________________________ R-SIG-Finance@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-finance -- Subscriber-posting only. If you want to post, subscribe first. -- Also note that this is not the r-help list where general R questions should go.