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...density points I get an error, this happens also when I use the matrix (mat) for ev: > fhat <- fitted(fit) Error in fitted.locfit(fit) : NA/NaN/Inf in foreign function call (arg 10) I think arg 10 means "dp" and there I got the following parameters: > fit$dp nnalph fixh adpen cut lk df1 df2 rv 0.7 0.0 0.0 0.8 0.0 0.0 0.0 1.0 swt rsc 6228.0 0.0 When I tried locfit with ev="tree", lk, df1, df2, rsc are changed, so I think there is the problem!! If I use the predict() function, I get also an error message:...