On Mon, 2007-10-15 at 15:25 +0200, [EMAIL PROTECTED] wrote: > >>>>> "ms" == marc schwartz <[EMAIL PROTECTED]> > >>>>> on Mon, 15 Oct 2007 14:20:16 +0200 (CEST) writes: > > ms> On Mon, 2007-10-15 at 10:30 +0200, [EMAIL PROTECTED] wrote: > >> Full_Name: Bob O'Hara > >> Version: 2.6.0 > >> OS: Windows XP > >> Submission from: (NULL) (88.112.20.250) > >> > >> > >> Using horizontal=TRUE with boxplot() confuses it as to what is an x- > or y-axis. > >> At least, xlim= and ylim= are the wrong way round, log="x" (or "y") > and xaxt= > >> work as expected, I haven't looked at anything else. > >> > >> Some code to see if you can reproduce the bug (or discover it's in my > head...): > >> > >> boxplot(count ~ spray, data = InsectSprays) > >> > >> # Try to change x-axis: > >> boxplot(count ~ spray, data = InsectSprays, xlim=c(0,50)) > >> > >> # Plot horizontally: > >> boxplot(count ~ spray, data = InsectSprays, horizontal=TRUE) > >> > >> # Now try to change x-axis: > >> boxplot(count ~ spray, data = InsectSprays, horizontal=TRUE, > xlim=c(0,50)) > >> # Changes y-axis! > >> > >> # Now try to change y-axis: > >> boxplot(count ~ spray, data = InsectSprays, horizontal=TRUE, > ylim=c(0,50)) > >> # Changes x-axis! > >> > >> # Plot x-axis on log scale: > >> boxplot(count+1 ~ spray, data = InsectSprays, horizontal=TRUE, log="x") > >> # Does indeed change x-axis > >> > >> # Don't add ticks on x-axis: > >> boxplot(count ~ spray, data = InsectSprays, horizontal=TRUE, xaxt="n") > >> # Works as expected. > > ms> Hi Bob, > > ms> No, it's not in your head. This is documented in ?bxp, which is the > ms> function that actually does the plotting for boxplot(). See the > ms> description of 'pars' in ?bxp: > > ms> "Currently, yaxs and ylim are used ‘along the boxplot’, i.e., > ms> vertically, when horizontal is false, and xlim horizontally." > > ms> So essentially, the named 'x' and 'y' axes are rotated 90 degrees when > ms> you use 'horizontal = TRUE', rather than the vertical axis always > being > ms> 'y' and the horizontal axis always being 'x'. This has been discussed > on > ms> the lists previously. > > Yes; thank you, Marc. > > And the reason for this is very sensible I think: > > If you have a longish boxplot() or bxp() command, > and you just want to go from vertical to horizontal or vice > versa, it makes most sense just to have to change the > 'horizontal' flag and not having to see if there are other 'x*' > and or 'y*' arguments that all need to be changed as well. > Except that you must change xaxt/yaxt and log="x"/log="y" which do not follow the "along the box" logic, and behave differently than xlim/ylim.
Nothing of this is fatal, but this probably needs more than one iteration to find which way each of the x* and y* arguments works. cheers, jari oksanen ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
