Heat Maps looks like a table, which cells contain values and are colored in order to show which range these values belong to. These Charts are usually used in biology, mathematics, geography and everywhere else where we need to show the hierarchy of values.
In this sample we see two charts, demonstrating different types of human body types by fat percentage. One chart stands for men and the second one is for women. Each chart is a table with its cells showing the fat percentage. There are four body builds: lean, ideal, average and above average, and each type is represented by a separate color which is used to color the Heat Maps’ cells. There are legends enabled in both charts, and the legend items can be used for managing the chart performance. You can select or highlight all points (cells) with the fat percentage of one body type by clicking the appropriate legend item or hovering it. Tooltips are disabled and there are no horizontal axes in both charts, but the vertical axes are enabled and in both cases they display the age ranges, so the tables show the body types of men and women by the corresponding fat percentage adjusted for age.