Figure 4
From: Detection of oriented fractal scaling components in anisotropic two-dimensional trajectories
Orientation decomposition of centre-of-pressure (CoP) trajectory of a subject performing quiet standing with eyes-open condition. (a) Anteroposterior (AP) CoP vs. Mediolateral (ML) CoP. (b) Angle dependence of \(\log _{10} F^{(\theta )} (\tilde{s})\) vs. \(\log _{10} \tilde{s}\), where \(\tilde{s}=s/1.93\) in the second-order DDMA. (c) Angle dependence of the local slopes of \(\log _{10} F^{(\theta )} (\tilde{s})\) vs. \(\log _{10} \tilde{s}\). (d) Angle dependence of the slope in the range of \(1.2< \log _{10} \tilde{s} < 2.5\). (e) Reconstructed components \((\hat{\epsilon }_{1}, \hat{\epsilon }_{2})\). (f) Fluctuation functions of the reconstructed components of \(\hat{\epsilon }_{1}\) with \(\theta _{1} = 96^{\circ }\) and \(\hat{\epsilon }_{2}\) with \(\theta _{2} = 34^{\circ }\) in second-order DDMA.
