Fig. 4
From: Graph mining for the detection of overcrowding and waste of resources in public transport
Correlation between supply and demand of the bus network. The supply and demand of the Fortaleza bus system are correlated. It is possible to observe the correlations in the intervals: 5:01 to 8:00; 8:01 to 11:00, 11:01 to 14:00; 14:01 to 17:00; 17:01 to 20:00 and 20:01 to 23:00, respectively, in items (a-f). In all of the figures in this panel, the red lines represent linear regressions [36, 37] applied to the data, the blue contoured lines represent the Nadaraya-Watson method [38, 39], and the blue dashed lines delimit the interval of confidence 95% estimated by bootstrap [40, 41]