On Aug 16, 2011, at 9:50 PM, Eric Heupel wrote:
I have what is probably a noob question, but....
I am trying to create a 3d plot to illustrate the range of values
for the following simple function:
A = B*(C/D)
B, C, and D are independent variables whose range are equal (e.g. 1
to 3 inclusive)
I figure it's not possible to map the surface of A on the 3d space
defined by B, C and D but I would like to create a surface defined
by the lower and upper limits of the variables - that is to say a
rectangle with corners at (1,1,1), (2,3,2), (3,3,3) and (3,2,2) with
a color map displayed on it corresponding to the values of A and a
color key to the side of that.
I have been able to wrap my head part way around persp and wireframe
and can create a surface for A~B*(C/D) in either, but have not
managed to create either the
The rgl package will allow plotting in pseudo 3D space ... once you
unwrap your head sufficiently to provide a suitable sample dataset.
Persp and wireframe are designed for a function of two variables: A ~
B*C. You could also plot slices at various levels of D with those or
perhaps more clearly with levelplot
--
David Winsemius, MD
West Hartford, CT
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