[Ifeffit] Exporting Athena projects data

Hi Bruce, hi mailing list readers. With the project I'm working with, it came out that would be really useful for me to export groups in both .xmu and .chi . More in details I have to deal with a function that depends on both the chi and xmu data. I tried to look at all the chances and through the guide but I didn't find any function to do that. I was thinking of exporting separately the .chi and .xmu data, but they have different point of the Energy(eV) and that makes hard the programming of my evaluating scripts. Should I use the spline function to estimate the .xmu data and use it combined to the .chi data? Hope it's all clear. Thanks Best Regards, Matteo, UiS