Hi Julien, thank you. I understand the reason, especially in the case of a gradient-based optimization algorithm I am now using Cobyla and I would like to understand why I reach convergence at the iteration 65 (at least counting the number of rows in the error history), which corresponds to the results of the evaluation 65, but, after that, I have other 7 evaluations and the last one is a calculation with all mean parameters (i.e. my starting point). Thank you!
2017-03-13 17:15 GMT+01:00 Julien Schueller <[email protected]>: > Hello, > > Short answer: the evaluations per iteration depend on the solver used and > the dimension. > See http://trac.openturns.org/ticket/351 > > j > > ------------------------------ > > *De: *"Anita Laera" <[email protected]> > *À: *"users" <[email protected]> > *Envoyé: *Lundi 13 Mars 2017 16:41:14 > *Objet: *[ot-users] Evaluations vs. iterations - FORM > > Hi all, > I am performing FORM analysis and I am setting the maximum number of > iterations to 100. In many occasions I see that the performed number of > evaluations is larger than 100. > My questions are two: > 1- what does the number of evaluation represents and in what it differs > from the iterations? > 2- I can set the max number of iterations as a convergence criterion but > is there a way to control the evaluations? > > Thank you for your time! > > > _______________________________________________ > OpenTURNS users mailing list > [email protected] > http://openturns.org/mailman/listinfo/users > > > -- > Julien Schueller > Phimeca Engineering > www.phimeca.com >
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