A Heat Map Chart uses color-coded cells arranged in a grid to represent values across two dimensions. An ordinal color scale groups values into named ranges, making it easy to identify which category each cell belongs to.
This sample monitors server fan speeds across ten servers with fifteen fans each. Three color-scale ranges — Low (under 1300 rpm), Normal (1300–2300 rpm), and High (2300–3000 rpm) — give an instant visual overview of fan performance. The legend at the top lets you highlight all fans in a given speed range by hovering or clicking its item. Labels display the exact RPM value inside each cell, and tooltips are disabled to keep the view clean.
Follow the step-by-step Heat Map Tutorial to learn how such charts are built. See the Heat Map documentation for all configuration options.