If I possess a series of epochs, what would be the appropriate method for calculating the mean connectivity? Would it be necessary to concatenate all epochs before utilizing mne_connectivity.spectral_connectivity_epochs?
If you want spectral connectivity, then yes.
Also there is this example which walks thru differences between “time-resolved” and “epoch-resolved” spectral conn: Comparing spectral connectivity computed over time or over trials — MNE-Connectivity 0.6.0dev0 documentation
If I have epochs data from multiple subjects and want to compute connectivity for the entire group, what should I do?
Not a supported feature. Unclear what that would mean. If you trying to assume that all subjects are a manifestation of a single connectivity structure then this is equivalent to just a concatenation of all the epochs.
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