On Wed, Feb 15, 2012 at 10:25 PM, P.B. Lecavalier <p.bar...@gmail.com> wrote: > Greetings, > > I would like to subset observations in a time series using xts, after > converting from ts to xts. > > X=ts(1:100, frequency=12, start=c(1976)) > X2=as.xts(X) > X2["1984"] > > The output: > > Feb 1984 98 > Mar 1984 99 > Apr 1984 100 > > What happened to January? The index is always one month off, with > X2["1976-01"] giving me Feb 1976. Should I set the time using something else > than ts? > > I know there is the window function, but the xts format is convenient for my > needs.
Any of these work with your sample data: X2[ trunc(time(X2)) == 1984 ] X2[ format(time(X2), "%Y") == "1984" ] window(X2, start = 1984) window(X, start = 1984) Sys.setenv(TZ = "GMT") X2["1984"] -- 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.
