Coherence reference channel for statistical analysis

[Rodolphe]

Dear Fieldtrip users,

Im actually doing analysis on EEG coherence data.
Plotting coherence data is quite easy by choosing  a reference channel
(cfg.cohrefchannel).
But it seems more complicated when it deals with statistical analysis.
Basically my question is: how do i choose a ref channel for an analysis like
the montecarlo (i guess the method is the same for other stat tests).
I tried to look at the code, but i start to be quite confuse between the
different options like 'channelcmb' 'labcmb' 'labelcmb', etc...
Apparently, ft_connectivityanalysis function analyze all possible pairs,
whatever i  specify as channel combinations...

Cheers,

Rodolphe.

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