[R] Persp plotting of kernel density estimate.

[Prof Brian Ripley]

On Wed, 17 Mar 2004, C Peroni wrote:

> Dear All, 
> 
> I am trying to visualize the surface of a bivariate kernel density
> estimate. 
> I have a vector of bivariate observations(x,y), and a function which
> computes the kernel density estimate z corresponding to each
> observation. I cannot generate the (x,y) data in the ascending order
> needed by persp(x,y,z). 
> I was wondering whether there is an R version of the S function interp.

There is, in package akima.

But, you really want to be interpolating in the kde: both MASS and 
KernSmooth have functions to do 2D kde for you.


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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