Number of communities in the three networks obtained with multi-resolution modularity as a function of the resolution parameter .

<p>Panel (a) refers to the navpoint network, panel (b) to the sector network, and panel (c) to the airport network. The blue line refers to one specific day, namely May 6, 2010. The black circles are the average number of communities and the red circles are the average minimum number of communities containing 90% of the nodes. Averages are taken over the 28 investigated days. Error bars are standard deviations. The horizontal black lines are the average number of communities in the existing partitions. Note that plots in panels (a) and (b) are not displaying the last plateau, corresponding to the case where each node is in its own community.