On Friday 16 April 2004 10:37 am, Matt Newville wrote:
To me, doing the multiple k-weight fit seems much easier and more robust, but maybe there's something else going on that I don't understand.
I also agree that doing multiple-k-weight fitting should be the bottom line. One of these threads started off with someone asking me about the mapping approach to S02/sigma^2, so I chose to answer that question directly. I don't think anyone would argue that it is easier use repeated kweight arguments in the feffit() command or to click multiple k-weight buttons in Artemis than it is to laboriously map out S02/sigma^2 for many k-weights. And, as Matt says, doing the MKW fit, one is sure to also find the minimum of chi-square. B -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu Code 6134, Building 3, Room 405 Naval Research Laboratory phone: (1) 202 767 2268 Washington DC 20375, USA fax: (1) 202 767 4642 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b National Synchrotron Light Source Brookhaven National Laboratory, Upton, NY 11973 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/