Hi, I looked at the suggestion related to MATH-352 regarding the robustness of the determination of the rank of the Jacobian in Levenberg-Marquardt. It does make sense indeed to replace ak2 == 0 with something more robust like ak2<= treshold. However, if one uses the epsilon machine for the threshold as suggested, several tests in LevenbergMarquardtOptimizerTest and MinipackTest fail. Strange, is not it: usually it goes in the other way round, when one becomes less strict, fewer tests fail. Here, it is the opposite.
Should one reassess some of these unit tests? Dim. ---------------------------------------------------------------------------- Dimitri Pourbaix * Institut d'Astronomie et d'Astrophysique * Don't worry, be happy CP 226, office 2.N4.211, building NO * and CARPE DIEM. Universite Libre de Bruxelles * Boulevard du Triomphe * Tel : +32-2-650.35.71 B-1050 Bruxelles * Fax : +32-2-650.42.26 http://sb9.astro.ulb.ac.be/~pourbaix * mailto:pourb...@astro.ulb.ac.be --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
