A Treemap displays hierarchical data as a set of nested rectangles. Each group is represented by a rectangle, which area is proportional to its value. Visit for more theoretical explanation about what it is. For a R implementation, see below.

Step by step - the Treemap package

The treemap package is probably the best way to build treemaps in R. The 3 examples below will teach you how to build a very basic treemap, how to deal with subgroups, and how to customize the figure. Note that once you master this package, you can very easily build an interactive version as described below.

Interactivity with d3treeR

The d3treeR allows to build interactive treemaps with R. Click on a group to zoom in and reveal subgroups. Click on the group name on top to unzoom and come back to the previous state. Note that the syntax used in previous charts above is exactly the same. Only one more line of code is needed, give it a go!

Show code Hover & Click groups for interactivity

Related chart types

Grouped and Stacked barplot
Pie chart
Circular packing