[Gretl-users] Re: Question about root-finding of a non-linear equation

Hi Marcin, thanks. It is a good thing that gretl's functionality has so much expanded that one cannot really remember  (or encounter) the whole of it. I tried both approaches (for a single unknown). The non-linear function had the unknown in several places at the same time, either exponentiated, or as an exponent itself, or in logs, or in the denominator. REPORT 1. Run both methods 10,000 times on the same data (two series ranging in (0,1)). 2. When they both succeed for the same data (see next for when they don't), they provide identical results (max abs difference 1.8256e-007). 3. fzero issues:  with the fzero function (where i provided only a single 0.01 initial value), the limitation I see is that we cannot constraint the value of the argmin (and I need it to be in (0,1) for example).