Re: [R] LOCFIT help

From: Takatsugu Kobayashi <>
Date: Sat 07 Jan 2006 - 14:44:55 EST


I have started to learn local regression models so as to identify statistically significant peaks in urban areas, such as population densities and congestion. I successfully ran /locfit/ and got several information on the fit. Now I got stuck. This is a very silly question, but isn't the first derivative of the fitted curve zero or close to zero? I got some very high numbers on that.

The commands I put are:

model.local<-locfit(log(POPDENSITY)~lp(x,y, nn=0.55))

span was determined by spgwr adaptive bandwidth.

Any help appreciated.

Thank you very much.


PhD student
Indiana University, Geography mailing list PLEASE do read the posting guide! Received on Sat Jan 07 14:51:28 2006

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