The scatter plot is based on the nonlinear chaos theory; it uses dots to represent values for two different numeric variables. The position of each dot on the horizontal and vertical axis indicates values for an individual data point. The long-range RR interval data were graphically expressed by the fast-computing technology, which was used for the diagnosis of heart rate variability and arrhythmias.

By clicking on the question mark icon next to "Scatter", on the upper left-handed corner of the App's Atrial Fibrillation page, you will have a caption with graphical examples of different scatter plots and their meaning.