Dear R users,
I am currently using the locpoly function from the KernSmooth package to
estimate densities. However, I have some trouble understanding how this
estimation technique is implemented in R. My main concern comes from the fact
that this function gives negative estimates when the bandwidth is sufficiently
large (mainly in the tails of distributions). I have read some articles on this
technique (C. Loader 1996,Hjort and Jones 1996) but from none have I managed to
understand how this is possible.
Could anyone give me some insight on how this function works in R?
Thank you!
Roberto.
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