[R-sig-Geo] R focal weights from probability density function

[Francesco Tonini]

Hi everybody,

I am trying to build a spatial grid ("window") containing the weights 
from a pre-defined prob. density function. Currently there is a raster 
package function called|focalWeight()|but the only options are 'circle', 
'Gauss' or 'rectangle'. I would like to create one using, for example, 
the Cauchy distribution. Any suggestions on how to do that?

Thank you,
Francesco

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