Scans_fitting

Wiki > General Scripts > Scans > Fitting

There is a generalised fitting module in the scans library which can be applied to scans. Adding to the module is described for general in the user manual the following information is to help when augmenting the fitting library. At the time of written all fitting was coded in the fit module.

The fitting action is performed using the function returned by fit_plot_action, the function has the x and y values, a plotting object and the last fit parameters handed to it; it should return the fit parameters if a fit was made.

The module uses inheritance to make more and more specific fitting. The current tree is:

• Fit
  • PolyFit
  • ExactFit
  • PeakFit
  • CentreOfMassFit
  • CurveFit
    • GaussianFit
    • DampedOscillatorFit
    • ErfFit
    • TopHatFit
    • SlitScanFit

CurveFit

Curve fit uses the scipy curve_fit function for non-linear least squares to fit the _model method of the current fit. To help it a guess of the initial parameters is supplied using the guess function.