Research Article
Application of the Lomb-Scargle Periodogram to InvestigateHeart Rate Variability during Haemodialysis
Figure 1
Synthetic data series with mean frequency of 1 Hz and zero phase, realized from the sum of two sinusoids via equation (4) with RR intervals (shown as circles) generated from (5) [12]. The resulting LS periodogram accurately locates peaks at ωl = 0.095 Hz and ωh = 0.275 Hz. (a) Synthetic signal. (b) Lomb–Scargle power spectral density estimate.
| (a) |
| (b) |