フィルターのクリア

Best Cubic Polynomial fitting

2 ビュー (過去 30 日間)
Naresh Pati
Naresh Pati 2019 年 1 月 22 日
回答済み: Torsten 2019 年 1 月 22 日
I have a data set (a versus b, see the attached file and the attached figure). fig1.png I want to find the coefficients p and q of the cubic polynomial b=p*a+q*a^3 that fits the data. Please help.

回答 (1 件)

Torsten
Torsten 2019 年 1 月 22 日
mat = [a a.^3];
rhs = b;
sol = mat\rhs;
p = sol(1)
q = sol(2)
fun=@(x) p*x + q*x.^3;
bb = fun(a);
plot(a,b,a,bb)

カテゴリ

Help Center および File ExchangeGet Started with Curve Fitting Toolbox についてさらに検索

タグ

Community Treasure Hunt

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

Start Hunting!

Translated by