Figure 2
From: Urban groups: behavior and dynamics of social groups in urban space
Urban group characteristics. (a) The histogram of the urban groups size. (b) The distribution of the number of urban groups per user. (c) The histogram of number of locations in which an urban group meets up. (d) The histogram of the number of days an urban group meets up. The red circle indicates the sharp decrease of the probability after value 46 of the number of days, which corresponds to the number of working days within the observation time period