This sample shows the required steps to apply B-spline curves to fit data.

  1. Select data series on left panel [Points].
  2. Select menu item <Fit><Fit Function>.
  3. The 'Approximation line' Wizard appears.
  4. On step 2 select item 'B-Spline'.
  5. On step 3 set 'Control points' value 'M=50'.
  6. Select item 'Closed curve' checked.
  7. New graph appears. See how curve fit conforms your data.
  8. On step 5 select line color and click Add Line.