The Smath 'Genfit' is ½ robust compared to Mathcad.
Up until now, that's the only offer from the bakery.
This document shows the automatic iterative procedure.
The art under the hood is the initials. As a rule, there
is no rule about guessing the "initials". A rule that
works generally is trial/error to pass the manual
initials through two points of the data set.
You can recomfort yourself that some model are so
reactive that even Mathcad can not do.

Jean

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