The sample introduces the Non-linear fitting models.
  1. Select data series on left panel [Points].
  2. Select menu item <Fit><Fit Function>.
  3. The 'Approximation line' Wizard appears.
  4. To find regression line on step 2 select item 'Regression line' and on step 3 set Polynomial degree value '3'.
  5. New graph appears. On step 5 select line color and click Add Line.
  6. To find nonlinear fit, on step 2 select item 'Non-linear'.
  7. On step 3 select Family 'Peak' and Function 'Edgeworth-Cramer'.
  8. On step 4 click Recalc.
  9. New graphs appear. See how curve fit conforms your data.
  10. On step 5 select line color and click Add Line.
  11. Close the dialog and select menu item <View><Fitting log> to compare the fits.