Source: The Stanford GraphBase
This Arc Diagram visualizes character co-occurrences in Victor Hugo’s Les Misérables. Each character is represented by a circle, and the thickness connecting arcs represent the number co-occurrences with another character in a chapter. Each circle’s size represents the sum of all that character’s co-occurrences.
Compare this display to a force layout and a matrix diagram.
Many thanks to Stanford’s “A Tour through the Visialization Zoo”. This visualization is based upon the arc diagram which appears there.