Fit Analyses |
For a nonparametric smoother with a parameter ,the fitted values can be written as
The degrees of freedom, or the effective number of parameters, of a smoother can be used to compare different smoothers and to describe the flexibility of the smoother. SAS/INSIGHT software defines the degrees of freedom of a smoother as
![]() Note |
Two other popular definitions of degrees of freedom for a smoother are ![]() ![]() |
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