Topic: Piecewise Regression and Splines

Multiple Knots and Segment-Specific Slopes

Knot Multiplicity and Spline Continuity

Interpreting Spline Curves Without Reading Coefficients as Slopes

Effective Degrees of Freedom in Smoothing Splines

Estimating an Unknown Breakpoint by Grid Search

Diagnosing Spline Fits With Residuals and Knot Sensitivity

Deriving the Hinge-Function Basis

Cubic Regression Splines and Smoothness Constraints

Constructing Natural Cubic Splines

Continuous Piecewise Linear Regression at a Fixed Knot