Hi!
I'm using nlgreyest command to estimate parameters of a grey-box model and using different types of search methods, like "lsqnonlin" (Trust region reflective algorithm provided by the Optimization Toolbox) and "lm" (Levenberg-Marquardt least squares search).
Considering the lsqnonlin method, I saw that it is possible to input upper and lower bounds, but I can't seem to find it in nlgreyest options set. Is it possible to do it?
I'm asking this because there are variables that must be >=0 and I would like to search for answers that respect this restriction. If I can't set upper and lower bounds, is there any other way to look at this problem using nlgreyest?
Best regards,
Rodrigo Pereira de Sousa
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