Hi Folks, It's been on my To-Do list for many years, and was one of the arguments for needing to be able to handle multi-dimensional arrays for EXAFS analysis. So I'm happy to say that the Continuous Cauchy Wavelet transform of Munuz, Argoul, and Farges (from American Mineralogist 2003) is now (only ten years late) available in Larch. See http://xraypy.github.io/xraylarch/xafs/wavelets.html for an example. The code (see https://github.com/xraypy/xraylarch/blob/master/plugins/xafs/cauchy_wavelet.... ) is adopted from the matlab code of M Munoz and F Farges, and that publication should be used as the citation for this routine. I know there are other implementations of wavelet transforms for EXAFS.... suggestions for changes or additions are welcome, as is additional code. The ability to actually fit data in wavelet space is not yet implemented. This was sort of planned for, and so shouldn't be too difficult to do. If anyone is interested in trying to fit EXAFS data in wavelet space, please let me know. I try to avoid too many announcements about why you should be using Larch instead of Ifeffit, but this is a clear case of something that was impossible in Ifeffit, but added as a single file of code (less than 150 lines, including code documentation) to Larch. --Matt