Figure 2
From: Reconstruction of the respiratory signal through ECG and wrist accelerometer data
Synchronization matrix. Phase synchronization indices \(\gamma \) according to Eq. (5) between all pairs of respiration proxies (see Table 1) and the flow have been averaged over the complete sleeping period and all 223 subjects. They are presented in a symmetrical color-coded matrix with brown indicating full synchronization and white indicating no synchronization—see color bar on the right.
