Cubic spline interpolation

Performs and visualizes a cubic spline interpolation for a given set of points.

Syntax for entering a set of points: Spaces separate x- and y-values of a point and a Newline distinguishes the next point. Hit the button Show example to see a demo.

Equation

By default, the algorithm calculates a "natural" spline. Details about the mathematical background of this tool and boundary conditions can be found here.

x-value

LaTeX

math interpolation cubic spline function points x y