[S] smoother spline cv values

Bill Shipley (bshipley@courrier.usherb.ca)
Wed, 25 Mar 1998 13:27:57 -0500


when using the smoother.spline function with data in which there are
multiple y-values for each x (i.e. replicate x values), the smooth seems to
be based on the mean values of y for each unique x and weights that are the
number of replicate values per x (is this true?).
If this is true, then does the function use these weights in estimating the
final cross validation score (i.e. the cv.crit value)?
If it does not, then any point-wise confidence intervals that use the
cv.crit value will be wrong.
Bill Shipley
Departement de Biologie
Universite de Sherbrooke
Sherbrooke (Quebec)
CANADA J1K 2R1
bshipley@courrier.USherb.ca
voix: 819-821-8000 poste 2079
telecopieur: 819-821-8049
Visitez notre site WEB : http://www.usherb.ca/SCES/BIO/index.html

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