We need to apply an FFT to the RRI, not the raw ECG. Use the YouTube video (https://www.youtube.com/watch?v=_GIDC8_lOvw) at timestamp 5:58 for reference as to what we need to accomplish.
Ultimately, we need to run the FFT on the RRI and correctly categorize the components of the signal into LF, HF, LF/HF ratio, vLF, and uLF.
The FFT is one missing piece.
We need to apply an FFT to the RRI, not the raw ECG. Use the YouTube video (https://www.youtube.com/watch?v=_GIDC8_lOvw) at timestamp 5:58 for reference as to what we need to accomplish.
Ultimately, we need to run the FFT on the RRI and correctly categorize the components of the signal into LF, HF, LF/HF ratio, vLF, and uLF.