Fig. 8From: A new approach to the space–time analysis of big data: application to subway traffic data in SeoulThe third mode of CSEOF representing the weekly patterns of passengers for Subway Line #2: a hourly and total number of boarding passengers at each of the 50 subway stations numbered from 201 to 250; b hourly and total number of alighting passengers; c number of boarding (red) and alighting passengers in all stations; and d corresponding amplitude time series. Heightened activities are noted on Wednesdays complementing the second CSEOF modeBack to article page