Make Residual Plot

Fathom Reference > Fathom Menus > Graph Menu > Make Residual Plot

Available when a scatter plot with a line or plotted function is present or is selected. Adds a new plot to the selected graph, below the main plot, which shows each point’s vertical distance from the line or function on the plot.

If you have more than one line or curve plotted on the graph, you must first specify for which line or function you want residuals plotted by selecting the equation of the function you want used. Once the residual plot is made, you can change its focus by selecting a different line or curve.

Data points in a residual plot can be dragged around, just like data points in the main plot. When data are dragged, the entire graph updates dynamically. For example, if the residual plot is based on a least-squares line, dragging a point may influence the line, and therefore the rest of the points in the residual plot will move to reflect their residuals with respect to the (now moving) least-squares line.