Graph manipulation

These four files are intended for adding/deleting nodes and edges in biograph object

Biograph class does not allow adding of deleting nodes or edges.
Here is the way how to overcome this. Graph_man.zip contains four M-files:

node_add.m - add node to existing graph
node_del.m - delete node from existing graph
edge_add.m - add edge to existing graph
edge_del.m - delete edge from existing graph