None linear least square fit for complex model
显示 更早的评论
Hi,
I am trying to fit my data in log-log space. my model is 10 log (P(f))=10 log (P_0) + 10 log [1+(f/F_0)^k]- 10k log (f). the predector is the frequency (f), and the response is the estimated spectral density P(f). unknown coeficients are P_0, F_0 and K.
I have tried different matlab functions, but unfortunately there is no one able to fit my model. Please any help.?
Thank you in advance
Sat
回答（1 个）
Stephan
2019-3-17
0 个投票
Hi,
have a read here:
There is an example how to fit a custom equation. This should solve your problem. If you do not have Curve Fitting Toolbox, you can do it very similar with lsqcurvefit from the Optimization Toolbox.
Best regards
Stephan
2 个评论
Sattar Isawi
2019-3-17
Stephan
2019-3-17
Maybe if you provide what you have tried so far and attach your data, someone can help.
类别
在 帮助中心 和 File Exchange 中查找有关 Least Squares 的更多信息
2019-3-17
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
