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Model Fitting Tab

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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.

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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

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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.

Used By

Muon Analysis Frequency Domain Analysis