If I already had a function and some points(x,y), how can I find six parameters in a function?

1 次查看（过去 30 天）
mingxing Liao
mingxing Liao 2021-1-10
评论： Alex Sha 2021-1-11
I already known a function: a+b.*exp(c.*t)+d.*t.*exp((e.*t).^f
unknown parameters are 6 : a b c d e f.
some points:
Please help me. Thanks!

请先登录，再回答此问题。

回答（1 个）

Matt J
Matt J 2021-1-10
fminspleas would be a good choice,
https://www.mathworks.com/matlabcentral/fileexchange/10093-fminspleas
seeing as 3 of your parameters (a,b, and d) are intrinsically linear,
funlist={1, @(cef,t) exp(cef(1).*t) , @(cef,t) t.*exp((cef(2).*t).^cef(3)) };
[cef,abd]=fminspleas(funlist,[c0,e0,f0], t,y);
[a,b,c,d,e,f] = deal(abd(1), abd(2), cef(1), abd(3), cef(2),cef(3));

类别

在 Help Center 和 File Exchange 中查找有关 Least Squares 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