[R] plotting intersecting planes

[Paul Murrell]

Hi

It is possible to perform some simple annotations to 3D plots -- see the
examples in help(persp).  It is also possible to do some fancier things
(e.g., http://www.stat.auckland.ac.nz/~paul/luvhue.pdf,
http://www.stat.auckland.ac.nz/~paul/hsvhue.pdf), even possibly
intersecting planes, but you have to do a lot of the work yourself and
you really have to know what you are doing, so this doesn't really come
under the heading of "simple solutions" :)

I'm afraid R does not currently have its own general-purpose
hidden-surface removal code so general-case 3D scenes via persp() are
just not possible.

Others have mentioned scatterplot3d;  depending on your platform, you
might also want to take a look at Duncan Murdoch's RGL package
(http://fisher.stats.uwo.ca/faculty/murdoch/software/)

Paul


Peter Dunn wrote:
> 
> Many thanks to all who replied to:
> 
> > > They are considering using R to avoid licensing issues with
> > > MATLAB.
> 
> ...by indicating that SciLab and Octave are available.  We actually
> are aware of both, and have at times tried both.  R is being
> considered as it possibly caters better for both the mathematics
> and statistics courses in our Department, without having to support
> two packages (such as Octave *and* R).
> 
> Still, I am looking forward to any more possible solutions to the
> original question, though Carlos Ortega suggested I search the
> News archive.  The solution appears to be to use  scatterplot3d,
> which isn't with my R, so I'll have to grab it and have a look.
> 
> The original request:
> 
> > about, say, plottting intersecting planes?  I can't seem to find a
> > way of plotting in 3D, and then adding another plot.
> > I guess I am after a 3D equivalent of  lines  or  points;
> > one plots the original plot and then adds to it.
> >
> > Ideally, this would be a simple task; we wouldn't want to have
> > our students mucking about too much to plot two planes intersecting.
> 
> Ideally, a simpler solution is still preferred!
> 
> But thanks again to everyone.
> 
> P.
> 
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x5392
paul at stat.auckland.ac.nz
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