208791.fig.003a
(a) Relation between time t and message number N of all the users over 24 hours
208791.fig.003b
(b) Relation between time t and message number N at individual level over 24 hours
Figure 3: Message data over 24 hour. Note: “1” on the x-axis means from “0” to “1” o’clock, “2” means from “1” to “2”, and so on.