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Automatic knot finding for piecewise cubic approximation. (Russian. English summary) Zbl 1099.65014
N. D. Dikoussar [Comput. Phys. Commun. 99, No. 2–3, 235–254 (1997; Zbl 0927.65009)] has presented a method of function parametrization based on 4-point transforms. Here, a simple stable to errors locally-optimal variant of the piecewise cubic approximation method with automatic knot finding is proposed.

MSC:
65D07 Numerical computation using splines
65D10 Numerical smoothing, curve fitting
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