[R] Persp plotting of kernel density estimate.

[Liaw, Andy]

See ?interp in the `akima' package.  Also, I believe the `sm' package does
have function that produce the surface plot of 2D kernel density surface.

HTH,
Andy

> From: C Peroni
> 
> 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.
> 
> Would anybody be able to help.
> Thank you in advance.
> 
> Chiara
> 
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