Hi all,

Happy New Year to all! I've been busy pushing the new versions of Artemis and Ifeffit pretty hard (3-edge fits, over 100 paths, also over 100 guess,def,set parameters) and they seem to be behaving pretty nicely. There are certainly some advantages and some disadvantages to this compared to the old FEFFIT package; one major advantage is this will certainly reduced the learning curve for new undergraduates in my group.

I am posting now because I am not sure I understand the behavior of the spline clamps in Ifeffit. When I set a top end to the spline range that is below the top of the data range, the high spline clamp has very little, if any, effect. (As a simple example, if I take the "clamp.prj" project that comes with Athena and set all of the spline ranges to top out at 400 eV, all four backgrounds look the same.) Is this what should be happening, or is this a bug?

In case this is a bug, here's the version information:

Athena 0.8.024 and ifeffit 1.2.4 running on Windows XP.

I'll also be glad to send a project file to Bruce or Matt if they wish, although it would just be the clamp.prj file with the top of the spline range changed...

--Scott