On Wed, 23 Jun 2004, ZABALZA-MEZGHANI Isabelle wrote: > I am using optim with a L-BFGS-B method to minimize a function. As I've > understood, the way to specify a tolerance for stopping optimization is > through "factr" argument. > My function, is by construction, minimal when equal to 1. I wonder if there > is any way to pass this info to "optim".
No, as the problem is assumed to be scaled so this is approximately true. > If not, how "factr" argument works > (I am quite confused about the relationship between this argument and the > Machine eps). Please, could someone give me an example ? The (absolute) convergence tolerance is factr times the Machine eps, and the help page does already give you an example. You can read the references for further details. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
