3 ms·
Cubic splines, which are piecewise cubic polynomials, have been widely used by statisticians for nonparametric regression. "Natural" splines are constrained to
by Bostonian 6y ago
Cubic splines, which are piecewise cubic polynomials, have been widely used by statisticians for nonparametric regression. "Natural" splines are constrained to be linear in the tails, which reduces the danger of extrapolation.