[R] 3-D plot of likelihood

Duncan Murdoch murdoch at stats.uwo.ca
Mon Dec 10 17:58:32 CET 2007

On 12/10/2007 11:26 AM, David Bickel wrote:
> Could anyone recommend a package for visualizing a likelihood function
> of two scalar parameters? I would prefer a three-dimensional plot
> similar to the kind Mathematica is known for, perhaps generated by a
> package not specific to likelihood.

The basic strategy is to calculate a matrix of values of the likelihood, 
corresponding to all combinations of values of two vectors.  Then 
persp()  (in graphics) or persp3d() (in rgl) can display the surface.

I don't know of anything that corresponds to curve() to do the matrix 
calculations automatically, but it may well exist.

Duncan Murdoch

> David
> ______________________________
> David R. Bickel
> Ottawa Institute of Systems Biology
> BMI Dept., University of Ottawa
> http://www.oisb.ca/members.htm
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