This tutorial introduces the topics of FFT and Wavelet transformations.
  1. Select data series 'Raw data' on left panel [Points].
  2. Select menu item <Analysis><Filter>.
  3. The dialog appears.
  4. Use logarithmic scale.
  5. To eliminate a noise, click the [Signals] tab and select 'FFT filter' and 'Low Pass' items checked.
  6. Vary the value 'Low' to smooth.
  7. Click the [Series] tab and select line color.
  8. To change the name of new series, click Formula.
  9. Click Apply and close the dialog.