** Lay out a tree or forest. **

** [x,y,h,s] = treelayout(parent,post) **

** parent is the vector of parent pointers, with 0 for a root. **

** post is a postorder permutation on the the tree nodes. **

** (If post is omitted we compute it here.) **

** x and y are vectors of coordinates in the unit square at which **

** to lay out the nodes of the tree to make a nice picture. **

** Optionally, h is the height of the tree and s is the **

** number of vertices in the top-level separator. **

** **

** **

** See also ETREE , TREEPLOT , ETREEPLOT . **

** **