Hi, Earlier today Michael Green asked Matt a question of the variety "How do you do ______?" Athena (and artemis) may provide some help with regards to questions like that. If you look in the Edit menu, you will see a item that says "Display Ifeffit buffer". This shows a text box which displays all text strings that have been sent by athena to ifeffit. This is useful to folks who want to learn ifeffit's syntax. To use the example that was just posted to the mailing list, one could read some data and a feff chi.dat file. Then plot the data in mu(E) and the background without a standard. Then tell athena to use the chi.dat file as a standard and replot in energy. Because the standard was changed, the spline will be redone using the newly chosen standard. All of the ifeffit commands to do this will be written to the ifeffit buffer for your examination. Regards, B -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu U.S. Naval Research Laboratory, Code 6134 phone: (1) 202 767 5947 Washington DC 20375, USA fax: (1) 202 767 1697 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b, X24c, U4b 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/