SPLINES
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A cubic spline is a collection of polynomials of degree less than or equal to
3, defined on subintervals. A separate polynomial is fitted for each neighbourhood, thus enabling the fitted
curve to join all of the points
The order of splines is not limited to three, although cubic splines are the
most common.
Generalized Additive Models 23.4.96 Page : 5e of 15
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