A series of similar graphs that use the same scale. This allows for easy comparisons between variables. A single chart represents each categorical variable, such as sales personnel; the individual charts are grouped together on a single display.
• Allows easy comparisons by using the same scale for each chart
• Avoid showing too much detail in any individual chart.
Sosulski, Kristen. Data Visualization Made Simple (p. 52). Taylor and Francis. Kindle Edition.