![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1498649/image.png)
Writing a function in MATLAB
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I want to simply write this mathemtical equation in MATLAB, but I am getting some error. Please help.
13 commentaires
Sam Chak
le 1 Oct 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)
Réponse acceptée
dpb
le 1 Oct 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);
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Spreadsheets dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!