Greetings! I want to follow the evolution of a Nelder-Mead function minimisation (a function of 2 variables). Hence each simplex will have 3 vertices.
Therefore I would like to have a function which can output the coordinates of the 3 vertices after each new simplex is generated. However, there seems to be no way (which I can detect) of extracting this information from optim() (the 'trace' argument to 'control' does not seem to have provision for this, according to '?optim', and I have tried it out without success). I have had a good search through the R resources without finding anything of the kind. Of course I could write my own implementation of Nelder-Mead in R, and generate the required output in my own way, but I would prefer to learn that this is already been done! Any suggestions? With thanks, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 10-Oct-09 Time: 22:26:16 ------------------------------ XFMail ------------------------------ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
