python - Avoid oscillations of the curve fitting -


i have got experimental data (orange points). data not have oscillations nature. curve fitting (polynomial) , obtain green points. may see there oscillations closer beginning of x-axis.

i came idea of dividing initial data several parts (based on derivations example) , curve fitting of each part additional conditions on boundaries (equivalent of first , second derivations).

before start implement find out if there implementation of similar algorithm? or maybe can advice me method of avoiding oscillations?

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