Figure 2
Degree distribution of SCAU1031 network (panels A,B) and SCAU1105 network (panels C,D). Panels A and C are shown in linear scale, while panels B and D are shown in log-log scale. As shown in panel A, the degree distribution of the SCAU1031 network can be well fitted by applying a mixture of two Gaussian distributions (blue line), which significantly deviates from the idealized Poisson distribution of the counterpart uniformly-random network with the same number of nodes and edges (red line). As shown in panel B, the SCAU1031 network exhibits a degree distribution significantly different from the power-law distribution. Thus, the CPI data acquired on weekdays are neither uniformly random nor scale-free. In contrast, SCAU1105, a CPI network acquired on a weekend, exhibits a typical power-law degree distribution (panels C,D).
