When I try this: > x <- as.POSIXct(Sys.Date() + 0:9) > plot(x, x) > plot(x ~ x)
The first one does give me dates on both axes but the second one gives numbers on the Y axis. Note that you can always not print the axis with plot and then do it yourself with axis or Axis. This works for me: > plot(x ~ x, yaxt = "n") > Axis(x, side = 2) > R.version.string # Windows Vista [1] "R version 2.6.1 Patched (2007-12-06 r43610)" On Jan 14, 2008 6:37 PM, Jingru Dai <[EMAIL PROTECTED]> wrote: > Hi, everyone > > I've been trying to make a scatter plot of POSIXct format data to see > the difference between two start time. > Like X: > [1] "1995-05-26 19:00:00" "1995-05-27 01:00:00" "1995-05-27 07:00:00" > [4] "1995-06-29 01:00:00" "1995-06-29 07:00:00" "1995-06-30 13:00:00" > [7] "1995-06-30 19:00:00" "1995-07-01 01:00:00" "1995-07-01 07:00:00" > ...... > Y: > [1] "1995-05-26 19:00:00" "1995-05-27 01:00:00" "1995-05-27 07:00:00" > [4] "1995-06-29 01:00:00" "1995-06-29 07:00:00" "1995-06-30 13:00:00" > [7] "1995-06-30 19:00:00" "1995-07-01 01:00:00" "1995-07-01 07:00:00" > ....... > > But it seems plot(x,y) doesn't work, y have to be numeric format. Is > there any special command for that or I should change the format of the > data? > Thanks > > Jingru Dai > ---- > School of Mathematical Sciences > Rm 454, Building 28 > Monash University, 3800 > Victoria, Australia > > ______________________________________________ > 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. > ______________________________________________ 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.
