Optimization to fit a curve to data (problem with the InitialPopulationMatrix)

I am triying to fit the eclosed data using optimoptions, and for that I used the gradient descent.

This is the objective function, but in case someone has better idea would be great!

x = 1:size(Data,2);

I think I have to add the 'InitialPopulationMatrix' but I didn't know how to add it

I would appreciate any help & Thanks!

Answer 1

[Matt J]

Instead of

x = 1:size(Data,2);

perhaps try a more normalized range of x, e.g.,

x=linspace(0,1,size(Data,2))

[Hidd_1]

Do you have any idea about how can I improve the fitting?

[Matt J]

SInce you accepted the answer, I assume you got my suggestion to work?