Fig. 5
The measured dz,k(t) (in blue) and estimated \(\widetilde {d}_{k}(t)\) (in red) displacement for PT candidates: a a sit-to-stand transition b a stand-to-sit transition and c a miscellaneous movement, p1 accounts for the linear drift, p2 determines the amplitude of the elevation change, p3 is the time localization of the postural transition event, and p4 is related to the transition duration. R2 is the R-squared of the fitting