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RE: st: RE: -locpoly-

From   "Nick Cox" <>
To   <>
Subject   RE: st: RE: -locpoly-
Date   Tue, 1 Jun 2004 19:05:03 +0100

My opinion is that this would miss the point. 
It seems an indirect way of comparing smoothers 
to me. Degree and kind of smoothing are difficult to separate 
in this way, quite apart from working out how many df 
you have here. 

Given one predictor, one response and two smoothers, 
the key information is given by a graph, and you 
can bring all you know about the problem to bear on that 
(underlying science; purpose of analysis?). Why 
throw all this into one omnibus test? 
> I apologize, the book is indeed by Fan, and Gijbels. However, 
> my question still
> stands for the authors of -locpoly-. Whether the references 
> listed below are
> sufficient in explaining the -locpoly- algorithm ?
> Concerning the statistical test, what is your opinion on 
> testing the distance
> between the distribution of the parametric "y-hat" and the 
> distribution of the
> non-parametric "conditional-y-mean" ? Such as the original 
> Kolmogorov-Smirnov
> or Anderson-Darling tests.

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