Python 3.4 is required for these examples.
The following will set up a local matplotlib environment for you, and start an IPython Notebook server:
$ make setup
$ make runAt which point a browser window will open, with a view of this notebook.
Note that this notebook assumes you have the Graphviz include files installed
under /usr/local. If this is not the case, you will want to manually
install pygraphviz into this virtual env.