On Monday 06 June 2005 09:27, Gerrit Schmithals wrote:
How do I implement more than 4 references? There is a box for entering the number but it does not enlarge the reference-list as I expected it to do.
All of this is explained in the doc page for the LCF dialog. (That is, I think I explained it all there. It may be [is?] poorly explained ....;-) The length of the standards list is set in the preferences dialog. The relevant parameter is linearcombo->maxspectra. The huge new feature in the LCF dialog is what I am calling combinatoric fitting. Suppose you have 4 standards in the list in the LCF dialog. You can press the button that says "Fit all possible combinations" and Athena will cycle through all fits of 2, 3, or 4 of the standards to your data. Now suppose that you have 11 standards in the list. Cycling through all possible combinations would be extrememly time consuming. What's more, the fits involving many standards probably wouldn't be very believable in most situations. So you can tell Athena to limit the order of fits. By setting the widget below the list to 4, you tell Athena to fit all possible combination of 2, 3, or 4 out of the 11 possible standards. (FWIW, that's 550 fits -- it takes about 12 minutes on the computer I am sitting at right now.) There were also some problems in how the interpolating of the standards onto the energy grid for the fit was done in certain situations in previous versions of Athena. Interpolation should be working properly now. HTH, B -- Bruce Ravel ----------------------------------- bravel@anl.gov -or- ravel@phys.washington.edu Environmental Research Division, Building 203, Room E-165 Argonne National Laboratory phone and voice mail: (1) 630 252 5033 Argonne IL 60439, USA fax: (1) 630 252 9793 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/