definition of fitting function in m2.py about laserbeamsize HOT 3 CLOSED

I think I have opened this issue to early. The differences are not only related to the different fitting functions, they also depend on the data set himself and consequently on the proper definitions of starting values and bounds where the fit function ends up.
Therefore, the fitting by the sqrt-function seems to be all right and I close this issue again.

from laserbeamsize.

You bring up an interesting point though. Changing the fitting function changes how errors in data are weighted. I have to look more carefully, but the current code might be overweighting beam size measurement made farther away from the beam waist.

from laserbeamsize.

I changed the code to fit to d and not d**2. Not that much difference.

from laserbeamsize.