[PD] cubic spline interpolation

[Gerda Strobl]

Hi list,

Has anybody implemented a cubic spline interpolation?
Or what could I use to do nonlinear interpolation without getting into 
deep mathematics?

I am transferring a matlab script from a colleague to pd--there a signal 
is spline interpolated at the beginning using the interp1 function
(yi = interp1(x, y, xi, 'method') from matlab(octave).

Thank you.

Gerda