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Model Fitting Tab¶
![../../_images/muon_interface_tab_model_fitting.png](../../_images/muon_interface_tab_model_fitting.png)
Overview¶
The model fitting tab is used to perform a fit across fit parameters and sample logs found in a results table within the Muon Analysis and Frequency Domain Analysis. To use Model fitting it must first be enabled via the feature flags. This tab allows you to select a results table, before selecting the data that should be plotted on the x and y axes. It is then possible to perform a fit using a selected fit function. The selected model fit data is displayed in a plotting pane on the right hand side of the interface. An example model fit plot is seen in the image below.
![../../_images/muon_interface_tab_model_fitting_plot.png](../../_images/muon_interface_tab_model_fitting_plot.png)
Fit Executes the specified fit.
Undo Fit Undoes the previously performed fit.
Results table Allows you to select a results table from a drop-down menu.
Select data Allows you to select the fit parameter or sample log data to be plotted on the x and y axis.
Covariance Matrix Opens the normalised covariance matrix for the currently selected fit domain.
Fit function browser¶
![../../_images/muon_interface_tab_fitting_browser.png](../../_images/muon_interface_tab_fitting_browser.png)
Right clicking in the central box will bring up a context menu for adding or removing functions.
Property This is a list of property names, individual functions can be collapsed down for greater legibility.
Value This lists the initial guesses for variables within fitting functions. Variables can be fixed for a given fit from the edit parameter values dialog box (click the ellipsis to the right of the value box).
Fit properties browser¶
Start/End X Defines the boundary values for the fit calculation.
Minimizer Choose the minimisation method for the fit.