Is it possible to plot the spectrogram of overnight sleep EEG data in mne? I don't want to create epochs but, have the spectrogram of continuous 8-9 hours. The examples I see in e.g. EEGlab (Matlab) have perfect color distinction which makes the outcome very readable. I would be grateful if you help me produce something similar but in mne.
Plot spectrogram of overnight sleep EEG using MNE
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Yes it is possible and quite easy!
Raphael Vallat's package
yasahas a function for doing exactly this for a single EEG channel from long-duration sleep data:https://raphaelvallat.com/yasa/build/html/generated/yasa.plot_spectrogram.html
The function uses multitapers for estimating Wigner spectra, implemented in the package
lspopt, and is quite fast. While you could use this directly,yasatakes care of a lot of moving parts and provides a more convenient interface.The function accepts a 1D NumPy array, so you'll need to get the data for a single channel from the
mne.Rawobject. For instance, if your EEG data is stored in the variableraw, you can extract the data as a 2D NumPy array usingraw.get_data()and then select the desired row (channel). There are plenty of ways of selecting data, tabulated nicely in the documentation:https://mne.tools/dev/auto_tutorials/raw/10_raw_overview.html#summary-of-ways-to-extract-data-from-raw-objects