Thank for you your advice, I will.
Add a comment to this answer asking for an example with constraints.
Hi, Does no one have any idea how to introduce constraints in the MultiNonlinerModelFit function?Thank you in advance for all your advice Hélène
Hi Hélène
Then you should indicate that in your post, so that anyone who wants to help can know how this function works. Thanks.
Hi, No, it is actually the MultiNonlinerModelFit function which is a general form of the nonLinearModelFit. You can find this function by following the link : https://resources.wolframcloud.com/FunctionRepository/resources/MultiNonlinearModelFit
Best Hélène
Could you please make sure your code is revised? for example there is no such function called MultiNonlinearModelFit. I think you mean NonlinearModelFit
MultiNonlinearModelFit
NonlinearModelFit