"Data that is presented as a worksheet containing X, Y, and Z data can be fitted using the Non-linear Curve fitter. Open the fitter by selecting Analysis:Non-linear Curve Fit[:Advanced Fitting Tool]."
But the Advanced Fitting Tool is not available if i have opend a 3d-graphic. For 2-d graphics everything works fine, for 3d it is written in grey.
Whats wrong? I've absolutely no idea what to do...