On Jan 23, 2013, at 6:08 AM, Agnes Meyder <[email protected]> wrote:= > The input consists of e.g x=11 values (11 dimensions), each of them > constrained by lower and upper bonds. When I observe the development of > these 11 values over the course of the optimization, I can observe the > same consecutive changes in x until step 97. Based on the same score for > the same x, nlopt-COBYLA chooses diverging changes in step 98 for x in > the fifth etc. digit after the dot. (See example below.)
Maybe there is some slight change in the roundoff errors in your code, which is affecting COBLYA? That is, are you sure that the floating-point values are *exactly* the same between runs? _______________________________________________ NLopt-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/nlopt-discuss
