Graphics Reference
In-Depth Information
Note
GeoLayout is a Gephi plug-in. If you have not already installed the
plug-in, you will need to save your work and do so now.
In the Preview task mode, hide nodes by setting their opacity to zero, and
turn on node labels, giving them a white outline. Bump up the maximum
width of links to 20.0, and change their color to be universally gray, rather
than mixing the colors of the nodes. Make them semi-transparent and
refresh the view. You will now be looking at a view of transport volume
between states. The fact that each state is connected to almost every other
state, however, is making it difficult to understand much about the flow,
especially for midsize to small states. An analytic would be useful here.
Return to the Overview task mode and, in the Statistics pane, run the
Modularity algorithm to group states into clusters where there is more
localized flow. Experiment with the settings until you get four to six clusters.
Any more than that will be too localized to be interesting, and any less will
be too global. Using the Partition tab, assign the modularity class of each
node to color. Return to the Preview task mode to view the result, as shown
in
Figure 13-3
.
