CurFit (Least Square Nonlinear Curve Fitting)
In the picture below, an example of curve fitting is shown. You can create fitting parameters (a, b, c here), set initial (starting) values, and link them to your equation. The example equation used a custom function, mysinx in 'Custom Function Help', and sin function. In some case the fitting does rely on the initial values. The batch fit check box is for a batch fitting. When it is checked, the cuve fitting will be repeated for the data sets in all the tables.
The results of fitting will be displayed in a new Table (called CurFit#N, below as an example).