Haven't you posted this before recently?
You are asking about the internal code of S-PLUS, and you should really
ask Insightful technical support, the only people who have access to that
code. You almost certainly didn't get an answer here because we don't
know for sure.
(From the Fortran version of supsmu I have, I would deduce that
supsmu(span="cv") linearly interpolates between three fixed spans using
local weights and does not store the interpolation weights. So the
effective span varies from point to point and is not even calculated.)
When you find out, please let this list know.
On Tue, 28 Dec 2004, AHC van Kampen wrote:
I'm using the supsmu( span="cv") function of splus. I use cross-validation
(span="cv" option) to determine the optimal span. Is there any possibility to
find out which span was finally selected. Or the cross-validation results
stored anywhere?
[Two very large signatures removed.]
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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