Default hermite spline (cSpline)

Creates a spline from x,y coordinates. x,y coordinates are interpolated by cubic polynomials between two knots. If a region in the raw data is monotone, the resulting interpolator is monotone as well.

Creates a spline from x,y coordinates. x,y coordinates are interpolated by cubic polynomialsbetween two knots. The slope at each knot is defined by a input slope vector.