Statistical features of transportation and city-based online social networks.

Datasets statistics of subways, the US airline and city-based online social networks: number of nodes n and edges m of the graphs, maximum degree kmax and average node degree ⟨k⟩, standard deviation of the degree σk, assortativity mixing by degree ρ, physical, topological and metrical diameter D, global and local efficiency Eglob, Eloc, costs and C/E property (defined as the ratio between cost and global efficiency). Both topological and metrical versions are calculated of the latter three indicators. Statistical features of transportation and city-based online social networks.