On 3/5/08, Fredrik Karlsson <[EMAIL PROTECTED]> wrote: > Hi, > > In my discpipline, it is common to plot one acoustic property on a > positive scale but from top to bottom on the ordinate and the same for > another measurement on the abscissa. > So, the origin of the plot is on the top right of the plot, with > increasing values to the left /down. This is to highlight the > correlation between the acoustic measurement and the position of the > forming structure, for instance when teaching it to students. > > The grouping ability of the trellis plot is quite handy whan plotting > many instances of the same thing, so I was wondering if it is possible > to make a trellis xyplot behave this way? > Converting all values to negative and changing labels to the negative > of the negative seems one solution to the reverseness of the axes, but > how do I change the position? Is it possible?
You can always specify explicit limits that are reversed, e.g., ylim=c(100, 0). If you want this as a general behaviour but don't know your data's range beforehand, one option might have been prepanel = function(x, y, ...) { list(ylim = rev(range(y))) } Unfortunately, this doesn't work when relation="same", as the step of combining the per-panel limits to obtain a common range disregards the order. -Deepayan ______________________________________________ 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.