Set parameterlimits while fitting with fminsearch

Hello, I have a function with which I have estimated the parameters for two linked differential equations. I minimize with fminsearch the quadratic errors between original data and function data. However, I have now extended/changed my differential equation, so that the fit spits out no more justifiable values. Therefore, I would like to know if there is a possibility to determine an area in which the parameter must be located. I hope someone knows a solution

Answer 1

[Matt J]

Here is a fairly popular version of fminsearch that lets you apply constraints

https://www.mathworks.com/matlabcentral/fileexchange/8277-fminsearchbnd-fminsearchcon

I haven't had the occasion to use it myself, though.

[Venja Schoenke]

thank you, that helped a lot

[Matt J]

You're welcome, but please Accept-click the answer if you consider your question resolved.