(Michael) Powell (of Harwell and Cambridge) invented several optimization methods. You will need to give us a precise reference.
Powell is associated with earlier versions of the Nelder-Mead, CG and BFGS methods implemented in optim() but in each case different variants have best stood the course of time. On Sun, 15 Jan 2006, Tolga Uzuner wrote: > Has anyone implemented Powell's Method for minimisation in R ? -- 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://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
