![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1498649/image.png)
Writing a function in MATLAB
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Kashif Naukhez
am 1 Okt. 2023
Kommentiert: Kashif Naukhez
am 1 Okt. 2023
I want to simply write this mathemtical equation in MATLAB, but I am getting some error. Please help.
13 Kommentare
Sam Chak
am 1 Okt. 2023
The x-data in the 'Double_q.xlsx' spreadsheet is not sorted in ascending order; it appears to resemble an exponential decay when sorted in Excel.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1498884/image.png)
Akzeptierte Antwort
dpb
am 1 Okt. 2023
% 1. Associate coefficients with parameter array to estimate
A --> b(1)
q1--> b(2)
q2--> b(3)
beta1>b(4)
beta2>b(5)
lambd>b(6)
% 2. Write anonymous function in b(), x
fun=@(b,x) b(1)*(b(2)*b(4)*x).^(1/(1-b(2))) + (1-b(1))*(1-(b(6)/b(5))+(b(6)/b(5))*exp((b(3)-1)*b(5)*x)).^(1/(1-b(3)));
% 3. Pick initial guess for b0 as estimates
b0=[....]; % look at the data and make some reasonable guesses for b(1) thru b(6)
% 4. Solve for b vector...
b=lsqnonlin(fun,b0);
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Spreadsheets finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!