A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors.
Setting up the heat map series
Heat maps require the modules/heatmap.js file to be loaded.
The heat map series is defined by setting the type to
heatmap. A heat map has an X and Y axis like any cartesian series. The point definitions however, take three values,
y as well as
value, which serves as the value for color coding the point. These values can also be given as an array of three numbers.
The color axis
Heat maps borrow a central concept from Highcharts Maps, the color axis. See the docs article on color axis for details
See heatmap in the Highcharts Maps docs.