Figure 2

(a) Example of a movement track during the Armin van Buuren dance event (black line). (b) Moving radius of gyration (MRG) of the same movement track (red line) (\(\text{unit} = \Delta t = 10~\text{s}\)). (c), (d) Decomposition in x- and y-coordinate time series (blue and cyan lines), together with the original AP sequences produced by the proximity detection method (grey lines). The movement track starts at time bin 1201, which corresponds to 8:40 PM. Dotted vertical lines indicate start and end times of the DJ show