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03/31/05 11:46am

Greetings, everybody!

I've got a list of points and values of some function at these points.

I interpolate it using 'SplineFit', Cubic method. It's assumed that during interpolation I should obtain a diffrentiable function. But simple differentiating via standard '-operator only provides me with a bunch of errors.

How can I obtain a derivative of so (or some other ways) constructed function?


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