b><u>Visualization and graphics.</u></b>
  (All the partitioners can also draw pictures of what they do.)
  gplotpart      - Draw a 2-way partition.
  gplotmap       - Draw a multiway partition.
  highlight      - Draw a mesh with some vertices highlighted.
  gplotg         - Draw a 2D or 3D mesh (replaces Matlab's gplot).
  etreeplotg     - Draw an elimination tree (replaces Matlab's etreeplot).
  spypart        - Matrix spy plot with partition boundaries.
  dmspy          - Spy plot of matrix in b