Figure 4From: Unified frame of reference improves inter-subject variability of seismocardiograms Effect of rotation on individual seismocardiogram trajectories. The individual seismocardiogram trajectories without rotation (left), with rotation using frame 1 (center), and with rotation using frame 2 (right) are shown. The gray plots are the mean seismocardiograms of individual subjects. The blue lines are the mean of the means of seismocardiograms of individual subjects.Back to article page