RankedEmbedding[l]
takes a set partition  of vertices  and returns an embedding of the vertices in the plane such that the vertices in each block occur on a vertical line with block  vertices on the leftmost line, block  vertices in the next line, and so on. |
takes a graph  and a set partition  of the vertices of  and returns the graph  with vertices embedded according to  . |
takes a graph  and a set  of vertices of  and returns a ranked embedding of  in which vertices in  are in block  , vertices at distance  from any vertex in block  are in block  , and so on. |
, you first need to load the Combinatorica Package using 
.
