Matlab does not show the curve equation in basic fitting

4 vues (au cours des 30 derniers jours)
john white
john white le 15 Fév 2021
Commenté : dpb le 15 Fév 2021
Hi
I have a code which I plot some datas then I want to get the equation of the plotted curve so I used basic fitting , spline interpolant is fit with plotted curve but when I check the ((show equations)) it just write the ((cubic spline interpolant)) in the figure window and didn't show the equation of the fitting curve
  1 commentaire
dpb
dpb le 15 Fév 2021
Because there is no simple expression like a quadratic for the spline interpolant; it's a series of cubics between each breakpoint.

Connectez-vous pour commenter.

Réponses (1)

John D'Errico
John D'Errico le 15 Fév 2021
You misunderstand splines. A spline does not have a simple equation you can write down. And while in theory, you could write down SOMETHING, it would be a terribly dense, lengthy thing. And unless you understand splines sufficiently well, it might not make a lot of sense to you anyway.
You can use a spline to interpolate, approximate, and predict values. However, there is no simple equation.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by