Fig. 2

Network size statistics. a The number of non-isolated nodes and edges in each snapshot. Dots represent network snapshots of school weeks. Triangles represent network snapshots of break weeks. The color shifts from red to green as time goes from the first week (early) to the last week (late). b Some statistics about the connectivity of the dynamic network. The red line shows the number of nodes in the largest connected component (LCC) in each week. The blue line shows the number of isolated nodes in each week (i.e., users that have no links in the given week and are thus absent from that week’s network snapshot). The black line shows the maximum possible number of non-isolated nodes in each week, i.e., the total number of considered users (the size of NetU)