On Tue, 15 Jan 2008, Jingru Dai 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?
It's possible, but there is not a canned solution. You could look at the code of graphics:::plot.POSIXct and modify to treat x the same way as y. Or simply use plot(x,y, xaxt="n", yaxt="n") axis.POSIXct(1, x) axis.POSIXct(2, y) > Thanks > > Jingru Dai > ---- > School of Mathematical Sciences > Rm 454, Building 28 > Monash University, 3800 > Victoria, Australia -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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.
