Figure 2From: Cities of a feather flock together: a study on the synchronization of communication between Italian citiesHeatmap for dynamic time warping distance. Each cell of this heatmap represents the mean value over weekdays of the DTW distance between two cities. In the x and y axes the cities are sorted by volume of calls from lower (top left corner) to higher (bottom right corner). Blanks in the diagonal represent the DTW distance between each city and itselfBack to article page