Enumeration DerivativeApprox

Akima approximation (local, non-monotonic, non-linear)

Fritsch-Butland approximation (local, monotonic, non-linear)

Weighted harmonic mean approximation (local, monotonic, non-linear)

Kruger approximation (local, monotonic, non-linear)

Parabolic approximation (local, non-monotonic, linear)

Spline approximation (non-local, non-monotonic, linear[?]). Different boundary conditions can be used on the left and right boundaries: see BoundaryCondition.

Overshooting minimization 1st derivative

Overshooting minimization 2nd derivative