I am working out a comparison of results for point pattern analysis using
ArcGIS and R, specifically the spatstat package. One of the key functions
for density calculations in ArcGIS is "Point Density" which counts the
points within a given distance (r) of the centroid of each cell in a raster
grid and divides it by the area of circle with radius r. The closest
equivalent I have found is the density.ppp function in spatstat, but that is
kernel density. Am I correct in thinking that this "reverses" the process of
point density and assigns a contribution value extending out from each point
in the data consistent with the function specified in the bandwidth
variable?

Any suggestions on the location of an appropriate point density function, or
barring that, the reason for preferring kernel density to point density.

Thanks in advance

Chris

-- 
Christopher S. Fowler PhD.
Center for Studies in Demography and Ecology
University of Washington
http://faculty.washington.edu/csfowler

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