186 • Big Data Analytics
screens with paper surveys; or (4) drawn by hand with mouse, using
node and link tools in a graphics window. Most popular network
metrics include Density, Geodesics, Freeman Centralities, Watts-
Strogatz Small World, Structural Equivalence, Cluster Analysis,
Krackhardt E/I Ratio, and Krebs Reach and Weighted Average Path
Length. Metrics are executed based on current network view—you
measure what is mapped. Many network layouts are possible using
automated algorithms and geometric layouts (arcs, lines, etc.), result-
ing in an unlimited number of custom views. Dierent actions can
be taken on selected nodes versus unselected nodes.
• Java Universal Network/Graph (JUNG) Framework (jung.source-
forge.net): JUNG is a Java ...