>>>>> "Duncan" == Duncan Murdoch <[EMAIL PROTECTED]> >>>>> on Tue, 09 May 2006 18:41:09 -0400 writes:
Duncan> I've been thinking of adding the possibility of Duncan> including "z" among the axes to be logged in image, Duncan> contour, and persp. In the first two, it would only Duncan> affect where the breaks were set if they are Duncan> calculated automatically; it would have a bigger Duncan> effect in persp. Duncan> For example, Duncan> image(x, y, z, log="z") Duncan> would set 12 colours evenly spaced on a log scale of Duncan> the z values. (12 because that's the default). Duncan> We already support Duncan> image(x, y, z, log="x") Duncan> to scale the x axis (though there's a spurious Duncan> warning; I'll fix that). Duncan> image(z, log="x") Duncan> fails because it tries to take a log of zero. Duncan> Does it seem like a good idea for these 3D functions Duncan> to support log="z" the way 2D functions do? Yes, I think it's a good idea. You forgot to mention filled.contour() which is image() + "color - legend" For that one, it would be particularly useful to automatically get a "evenly space in log-scale" one. Duncan> Duncan Murdoch Note that for things like the above, I have added a simple function lseq() in package 'sfsmisc' -- which I have contemplated moving to R. Maybe this could happen at the same time and you could make use of it for the above. Martin ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel