In the graph in the following figure, the nodes represent persons—light blue for males and dark blue for females. The directed edges represent phone calls from one person to another. Node size represents number of connections (degree centrality).
Graph of Phone Calls between Persons
The graph in the preceding figure is represented by the vertices and edges tables callers and calls, respectively.
| callerid | callername |
|---|---|
| 1 | John |
| 2 | Carla |
| 3 | Simon |
| 4 | Celine |
| 5 | Winston |
| 6 | Diana |
| callerfrom | callerto | calls |
|---|---|---|
| 1 | 2 | 10 |
| 1 | 3 | 2 |
| 1 | 4 | 5 |
| 1 | 6 | 6 |
| 2 | 4 | 7 |
| 2 | 6 | 12 |
| 3 | 6 | 1 |
| 4 | 6 | 4 |
| 5 | 6 | 10 |