On Dec 8, 2009, at 12:33 PM, David Grabiner wrote:
Hi list,
This was asked a couple of years ago but I can't find a resolution.
Is
there any way to get the coefficients from one of the local
polynomial fits
in locfit. I realize that locfit only constructs polynomials at a
handful
of intelligently selected points and uses interpolation to predict
any other
points.
That is not my understanding of what locfit does. I could be wrong and
am interested in correcting my misunderstanding if that is the case. I
thought a polynomial was fit at _each_ point. What pages in Loader's
book should I be reading.
I would like to know the terms of the polynomials at these points.
It seems likely that they are stored in [locfit object]$eva$coef but
I'm
having trouble making sense of that list. That list is the second
argument
passed into the C function spreplot called from preplot.locfit.raw
if that
helps.
Thanks,
David
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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