Figure 5.
Illustration of approach to evaluating whether data are nonsinusoidal. (A) Bandpass filtering at 4–6 Hz. (B) Intrinsic mode function with spectral peak in 4–6 Hz range, derived using empirical mode decomposition.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.