This example is an extension of the original example with the additional feature that clicking on a part of the graph will select it and rotate it to 90 deg.
A sunburst is similar to the treemap, except it uses a radial layout. The root node of the tree is at the center, with leaves on the circumference. The area (or angle, depending on implementation) of each arc corresponds to its value. Sunburst design by John Stasko. Data courtesy Jeff Heer.