# [R] bivariate kernel density estimates at point locations (rather than at grid locations)

Fri Dec 16 08:41:31 CET 2005

On Thu, 15 Dec 2005 14:21:17 -0500, Strickland, Matthew wrote:

SM> Hi,
SM>
SM> My data consists of a set of point locations (x,y).
SM>
SM> I would like to know if there is a procedure for bivariate kernel
SM> density estimation in R that returns the density estimates at the
SM> observed point locations rather than at grid locations. I have
SM> looked at a number of different routines and they all seem to
SM> return estimates at grid locations.
SM>

One option is to use (from package sm),
sm.density(xy, eval.points=xy, eval.grid=FALSE)
where xy in a (n\times 2) matrix.

Best wishes,