How to find minima from a fitted 3rd order polynomial

3 次查看（过去 30 天）
Gollapalli Prince
回答： Torsten 2019-3-5
As shown below, my data points are in blue
grey plot is fitted using 2nd order polynomial
Red plot is fitted using 3rd order polynomial, which seems to be better than 2nd order polynomial (quadratic fit)
How to find the minimum value of y for this 3rd order ploynomial ?
fitting.png

请先登录，再回答此问题。

回答（1 个）

Torsten
Torsten 2019-3-5
Solve y'(x)=0 for x and check whether f''(x) > 0.

类别

在 Help Center 和 File Exchange 中查找有关 Polynomials 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by