treemap()

treemap(root)

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

• node.x0 - the left edge of the rectangle
• node.y0 - the top edge of the rectangle
• node.x1 - the right edge of the rectangle
• node.y1 - the bottom edge of the rectangle

You must call root.sum before passing the hierarchy to the treemap layout. You probably also want to call root.sort to order the hierarchy before computing the layout.