Figure 4

Locations and service usage patterns of a sample user 81 during typical Friday and Saturday. The first and second rows represent cells and contexts assigned to cells. Home, Office, Other meaningful place, and Elsewhere are denoted by red, blue, green, and gray colors, respectively. Different depths of the same color indicate the different cells belonging to the same context. Service usage events are denoted by vertical lines in the rows of web, app, email, call, and SMS (from the third to the bottom).