betweenness             Vertex Betweenness centrality measure.
bridging                Valente's Bridging vertex measure.
constraint              Burt's Constraint Index.
csv.to.igraph           Convert a CSV file to an igraph graph object.
ens                     Burt's Effective Network Size and Constraint
                        index. The next two functions below provide
                        ways to measure the actors' access to
                        structural holes in a network. Structural holes
                        "provide opportunities to broker connections
                        between people" (Burt 2008).
influenceR              influenceR: Software tools to quantify
                        structural importance of nodes in a network.
keyplayer               Compute a KPP-Pos set for a given graph.
