Figure 8
From: Spatiotemporal correlations of handset-based service usages
Contextual correlations of service usages. Contextual correlations of service usages are measured for users 5 and 81 and for all users (from top to bottom). Fractions (left) and intensities (right) of service usages are defined in Eqs. (7) and (8), respectively. Standard errors are also provided for the user-averaged statistics.