#33: Data Analysis Dialog with Plot Fitting options.
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The Data Analysis Dialog is a feature in KaraboGUI that allows users to perform data analysis - mainly plot fitting - on the data displayed on the plotting widget. The dialog provides options to fit the data with different functions and plot the fitted data.

The `VectorGraph` plot widgets in Karabo have a tool button that allows users to access the Data Analysis Dialog.


.. figure:: images/data_analysis_toolbutton.png
    :alt: ToolButton
    :align: center

     ToolButton to access the Data Analysis Dialog.

Key Features of the Data Analysis Dialog
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.. figure:: images/plot_fitting_dialog.png
    :alt: Data Analysis Dialog
    :align: center

     Data Analysis Dialog with Plot Fitting options.



#. The dialog allows to fit the data with the following functions:
     a) Gaussian
     b) Sech Squared
     c) Step Function (CDF)
     d) Linear

#. "Fit Button": To trigger the fitting function and draw the fitting curve.
#. "Update Data Button": To fetch the current data from the device property. To perform the fitting, the "Fit" button shall be triggered, after updating the data.
#. Property Selector Combobox: This widget allows to select the property when the plotting widget has data from multiple properties. This widget is visible only when the plotting widget has data from multiple properties.
#. "Fit on update" toggle: This triggers the fitting function automatically when the data is updated.
#. "Auto update": To automatically update the data from the device property.
#. Fitting Function Result.

     .. figure:: images/plot_fitting_selected_area.png
          :alt: Plot Fitting Selected Area
          :align: center

          Plot Fitting using the data from selected range.

#. Plot area. The data is plotted in blue and the fitted data is plotted in red.
#. "Fit Data From Selection": This toolbar button allows the user to select the data range for fitting. Two vertical lines that appear on the plot can be dragged to select the data range.
#. Data Range: The range of data selected for fitting. This is shown only when the fitting is done on the selected data range.