Bruce,
Without those friendly warnings (reminders), beginners would likely fall down several rabbit holes before understanding many of the important steps necessary to get meaningful answers in EXAFS.
I know I would have.
Chris
*******************************************
Dr. Christopher Patridge
Assistant Professor
Department of Math and Natural Sciences
D'youville College
Contact: 315-529-0501
On Dec 5, 2013, at 1:19 PM, Bruce Ravel
On 12/05/2013 12:18 PM, Scott Calvin wrote:
While I defend that principle as a very important one, I'm not claiming it applies in Matt's case--it probably doesn't. To reproduce features at high-R, it IS necessary to have a model (i.e. paths) that cover the high-R contribution, and it sounds like Matt does not have those paths included in his model. But it's not necessary to FIT up to high R.
It doesn't apply. Matt filtered his data. Matt used paths that only include Fourier components within the filtered band. To suggest that it may somehow be reasonable that the fit could turn out other than how it did runs a real risk of misleading this fellow who is, apparently, a newcomer to EXAFS analysis.
P.S. My least favorite warning that Artemis provides is the one that tells you that you're including paths outside the fitting region, for just this reason. It's easy enough to change the preferences so that Artemis doesn't give that warning, and it's usually one of the first things I have my students do when they're first learning to fit.
OK. Whatever. Instead of complaining about this, perhaps you should consider hosannas of gratitude that I make it possible, easy even, to accommodate preferences different from my own.
B
-- Bruce Ravel ------------------------------------ bravel@bnl.gov
National Institute of Standards and Technology Synchrotron Science Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973
Homepage: http://xafs.org/BruceRavel Software: https://github.com/bruceravel _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit