Analysis: Fitting: Nonlinear Surface Fit
Nonlinear &Surface Fit:Open NLFit dialog to fit 3D functions on XYZ data
It is not accessible from script. This feature is for OriginPro only.
The Nonlinear Surface Fitting tool opens NLFit dialog and user can only select functions on the Surface Fitting category. Please refer to Origin User Manual for detail information about Nonlinear Surface Fitting.