During the [Munich workshop](https://indico.frm2.tum.de/event/622/) a user requested the ability to fit single crystal data, similar to the Matlab `fitspec` [code](https://github.com/SpinW/spinw/blob/master/swfiles/%40spinw/fitspec.m)
During the Munich workshop a user requested the ability to fit single crystal data, similar to the Matlab
fitspeccode