Joining the Parameters of Fit Curves

In some cases you may want to fit the data with two Gauss or Lorentz peaks with the same amplitude for example. You can do this in two ways: by specifying custom Fit Curve with your equation or by joining the 'amplitude' parameters of two peaks.

Joining parameters example

To join parameters of two or more Fit Curves select one of desired Fit Curves, then select desired parameter in parameters table and press Join button in the bottom of the panel (or double click on parameter). You can specify the selected parameters as equal or proportional by entering multiplier and constant for each parameter. Joined parameters are shown with blue color (instead of black) in curve parameters table in Fit Plot window.

In the example above the amplitudes and widths of tho peaks are joined and are equal. The positions of maximums are joined and -1 multiplier is set to the width of Curve 3.

Joining the amplitudes of two peaks Joining the positions of two peaks

See Also

Nonlinear Curve Fitting: Fit Plot