Fig. 5
From: In search of rules behind environmental framing; the case of head pitch
Top panel - Example of the raw acceleration data (taken from the heave axis) from a participant visiting the Botanic Garden to illustrate the obvious waveform due to walking and how (Middle panel) this is manifest in the head pitch (black line) but removed by smoothing (red line). The bottom panel shows the rate of change of the smoothed head pitch for comparison