Regression splines (parametric Smoothing splines (nonparametric Natural cubic splines o Polynomial fits tend to be erratic at the boundaries of the data o This is even worse for cubic splines o Natural cubic splines ameliorate this problem by adding the additional(4)constraints that the function is linear beyond the boundaries of the data Patrick Breheny STA 621:Nonparametric StatisticsIntroduction Regression splines (parametric) Smoothing splines (nonparametric) Natural cubic splines Polynomial fits tend to be erratic at the boundaries of the data This is even worse for cubic splines Natural cubic splines ameliorate this problem by adding the additional (4) constraints that the function is linear beyond the boundaries of the data Patrick Breheny STA 621: Nonparametric Statistics