cluster()

cluster(root)

Lays out the specified root hierarchy, assigning the following properties on root and its descendants:

• node.x - the x-coordinate of the node
• node.y - the y-coordinate of the node

The coordinates x and y represent an arbitrary coordinate system; for example, you can treat x as an angle and y as a radius to produce a radial layout. You may want to call root.sort before passing the hierarchy to the cluster layout.