Thanks for the prompt reply. Will dig into rgl ASAP. My sample data set is:
B,C,D,A 1,1,1,1 1,1,2,0.5 2,1,1,2 1,2,1,2 1,1,3,0.333333333 3,1,1,3 1,3,1,3 2,1,2,1 1,2,2,1 2,2,1,4 2,1,3,0.666666667 3,1,2,1.5 1,2,3,0.666666667 1,3,2,1.5 3,2,1,6 2,3,1,6 2,2,2,2 3,1,3,1 1,3,3,1 3,3,1,9 2,2,3,1.333333333 3,2,2,3 2,3,2,3 3,2,3,2 2,3,3,2 3,3,2,4.5 3,3,3,3 > On Aug 16, 2011, at 10:48 PM, David Winsemius wrote: > > 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 > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
