Fig. 3
From: On the use of approximate entropy and sample entropy with centre of pressure time-series
Sample entropy (SampEn) mean value (bars) and standard deviation (error lines) by group as a function of r for m = {2, 3, 4, 5} (from top to bottom) and N = 1200 (i.e. 60 s) for the anterior-posterior (AP) component of the centre of pressure displacement during quiet standing: a) m = 2, b) m = 3, c) m = 4, and d) m = 5