On the effects of signal processing on sample entropy for postural control - Fig 4

<p>We used the raw anterior-posterior time series (top) from one scene (the park scene, 120 seconds long) performed by a patient when standing on the floor to demonstrate the effect of detrending (middle) and differencing (bottom). The corresponding sample entropy values in this scene are: Raw: 0.463, Detrended: 0.56, Differenced: 2.6.