On 10/24/07, Paul Murrell <[EMAIL PROTECTED]> wrote: > Hi > > > Gustaf Rydevik wrote: > > Hi all, > > > > I'm trying to generate a plot containing a scatterplot, with marginal > > densityplots for x and y. > > However, when I try to generate a vertical densityplot, I get the > > message "warning: can't clip to rotated viewport", and nothing shows > > up. I'm probably misunderstanding how viewports are meant to be used, > > so if someone could give me a hint, I'd be most grateful. > > my system is R 2.5.0 (stuck, and can't upgrade for now) and windoms xp. > > > The warning says it all unfortunately; R only clips to rectangular > regions, so if you take a rectangle (viewport) and rotate it, and try to > clip to it, R can't cope (it's lattice that is trying to clip to some of > its viewports BTW). > > Of course, R could be slightly smarter and check whether the rotated > rectangle is still a rectangle (aligned with the x- and y-axes). I will > look at a fix for this in the development version of R. > > Unfortunately, there are still some problems with your example, because ... > > pushViewport(viewport(layout.pos.row=2,layout.pos.col=2,angle=270)) > > ... will not do what you want. The layout.pos.row/col mean that angle > (along with x, y, width, and height) is ignored. Instead you could try ... > > pushViewport(viewport(layout.pos.row=2,layout.pos.col=2)) > pushViewport(viewport(width=convertUnit(unit(1, "npc"), > "npc", "y", "dimension", "x"), > height=convertUnit(unit(1, "npc"), > "npc", "x", "dimension", "y"), > angle=270)) > > ... (all that conversion is necessary because otherwise the rotated > viewport is NOT the size you probably want). > > However, even then the result is not very nice because you have a lot of > work still to do to make the x- and y-scales on the three plots line up > (not just a matter of controlling the scales on each plot, but also a > matter of getting the plot margins the same size). > > If it was me, I would be starting to think about writing something from > scratch in grid at this point ...
I used essentially the problem for a guest lecture once, and the solution is outlined in http://www.stat.wisc.edu/~deepayan/771/rgraphics.pdf YMMV. -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.
