LinearSpline1D

class LinearSpline1D

Linear spline is the same as linear interpolation. A piece-wise cubic polynomials with equal value at each knot point.

\( y = C_0 + C_1 x \)

class LinearSpline2D

class QuadraticSpline1D

Quadratic spline is a piece-wise quadratic polynomials with equal value and equal derivative at each knot point.

\( y = C_0 + C_1 x + C_2 x^2 \)