Dear John and Duncan,
thanks for your ideas! Unfortunatly, calling spheres from rgl
did not resolve the problem on my machine.
Both - spheres3d() and rgl.spheres() -
behave the same: black spheres, all aqual colored.
The only difference beeing the looking angle and thebackround color.
Seems to me that the 'col=1:5' argument is completly ignored.
René
Zitat von "Duncan Murdoch" <murdoch.dun...@gmail.com>:
On 12/04/2012 2:27 PM, John Fox wrote:
Dear René,
I've confirmed that the spheres aren't coloured correctly on my
Ubuntu system (the first colour is used for all of the spheres),
and I know that this works right on Windows, as you mentioned. I'm
curious to try it on my Mac, but don't have that handy at the moment.
I also looked at the code for scatter3d.default(), and that is
pretty straightforward; scatterplot3d.default() draws the spheres
with the command
rgl.spheres(x, y, z, color = surface.col[as.numeric(groups)],
radius = size)
I'm copying this response to Duncan Murdoch (the coauthor and
maintainer of the rgl package) in case he has any insight into the
problem.
Thank you for drawing this issue to my attention.
Calling rgl.spheres looks dangerous to me: the rgl.* functions make
permanent changes to material properties. Generally it's safer to
call spheres3d, as all of the *3d versions of functions make local
changes.
But there should be no differences in that between Ubuntu and
Windows. Can you put together a simple example that does give
differences? For example, on Windows this gives 5 different colours:
rgl.spheres(1:5, 1:5, 1:5, col=1:5, radius=(1:5)/10)
My preferred version would be
spheres3d(1:5, 1:5, 1:5, col=1:5, radius=(1:5)/10)
Do they behave the same?
Duncan Murdoch
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