Generic peak fitting

This module is used to fit individual or groups of peaks with generic functions.

Getting started

Peak fitting is usually only performed on a short range of the dataset that contains one or a few peaks. As a first step, this range must be defined.

Step 1: Defining the data range

  1. Activate the "Add a new fit range"mode by pressing the corresponding button.
  2. Zoom in on the graph until the range to fit fills a good portion of the screen.
  3. Double-click on the graph at the position where the range starts.
  4. Move the cursor to the position on the graph where the range ends. Double-click to set the end position. While dragging the mouse cursor, the range is indicated visually.
After setting the end position, the range select mode is deactivated automatically and a new range item is added to the functions list. By double-clicking the start and end items, the values can be entered numerically.

Step 2: Defining functions

Now add functions to the range:

  1. Select the range item to which the functions shall be added.
  2. Select the type of function to be added from the dropdown menu.
  3. Activate the "Add a new function" mode by clicking on the corresponding button.
  4. Double-click on the graph to set the location of the first point. Depending on the type of function, the first point represents:
  • Double-click on the graph again to set the location of the second point. Depending on the type of function, the first point represents: