x contains Matlab code for several graph and mesh partitioning
methods, including geometric, spectral, geometric spectral, and coordinate
bisection.  It also has routines to generate recursive multiway partitions, 
vertex separators, and nested dissection orderings; and it has some sample
meshes and mesh generators.  

The toolbox contains a Matlab interface to Leland and Hendrickson's 
Chaco partitioning package, but it doesn't contain Chaco itself.  
The file &quot;chaco/README&quot; tells how to 