From: Roger Bivand On Wed, 8 Dec 2004, Bang wrote:
What package/code could I use to create a 3-d surface graph
of the predicted
values over two of the explanatory variables' coefficients?
I think you'll need the surface first, for example from interp() in the akima package, then visualise with persp() or perhaps rgl.surface() in package rgl.
But wouldn't it be better to predict on a regular grid, and graph that, than to interpolate an irregular set of predicted values (assuming the model is available such that prediction at any point is possible)? Andy
Jim James Bang Department of Economics University of Illinois Well I AM missing the back of my head.you COULD cut me a
little slack!
-Homer Simpson
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http://www.R-project.org/posting-guide.html -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93 e-mail: Roger.Bivand at nhh.no ______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html