Alan wrote:
Hi,
How do you obtain the limits of the plotting region in a scatterplot3d
plot? `par('usr')' does not seem to give sensible values, and that
vector only has 4 elements (not the expected 6).
Well, I never designed anything to do that, but it is possible with the
following function:
gets3dusr - function(s3dobject){
es3d - environment(s3d$points3d)
g3d - function(name) get(name, envir=es3d)
c(c(g3d(x.min), g3d(x.max)) * g3d(x.scal),
c(0, g3d(y.max)) * g3d(y.scal) + g3d(y.add),
c(g3d(z.min), g3d(z.max)) * g3d(z.scal))
}
#Example:
s3d - scatterplot3d(rnorm(5), rnorm(5), rnorm(5))
gets3dusr(s3d)
Uwe Ligges
Alan
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