deriv_eta¶
- TRXASprefitpack.mathfun.deriv_eta(fwhm_G: float, fwhm_L: float) Tuple[float, float][source]¶
Calculate gradient of eta of pseudo voigt profile with fwhm_G, fwhm_L based on Journal of Applied Crystallography. 33 (6): 1311–1316.
- Parameters
fwhm_G – full width at half maximum of gaussian part
fwhm_L – full width at half maximum of lorenzian part
- Returns
gradient of eta(fwhm_G, fwhm_L)