At Sat, 3 Nov 2007 18:46:38 +0100 (CET), [EMAIL PROTECTED] wrote: > I am using the multidimensionial minimization routines, and I get very > often an error code from gsl_multimin_fminimizer_iterate, namely > "iteration is not making progress towards solution". > > I get this error with all the gradient-based algorithms; I should say that > the function that I minimize is computed not very accurately, in the sense > that the gradients may not correspond too accurately to the function > itself. > > Why and when is the above mentioned error code issued?
The error code is GSL_ENOPROG - you can find the files where it is used in the multimin/ directory. Roughly speaking the error code is returned if the algorithm can't find a downhill step - maybe that occurs if the gradient is not accurate enough. -- Brian Gough _______________________________________________ Help-gsl mailing list Help-gsl@gnu.org http://lists.gnu.org/mailman/listinfo/help-gsl
