[FieldTrip] Help Regarding the Source Level Connectivity

[Kaniska Samanta]

Hi all,

I am new in using fieldtrip toolbox and source level connectivity analysis. I have constructed source form MEG data (Elekta Neuromag Triux system with 306 channels) by using LCMV beamformer technique (method = 'rawtrials'; to construct source level momentums for each individual trial).

Now when I try to compute brain connectivity using 'ft_connectivityanalysis' using method as 'coh' and complex as 'imag', I am getting the following error,

[cid:b26196d6-ba93-41a7-901d-32c9ee125b16]

please not I have 300 trials and the signal length is 401. And I have 67 sources.

[cid:03267fb0-0313-400d-9b99-6dbcc4318db3] [cid:f487710a-ad5f-4c19-bd6e-1d447e6cea44]

In the documentation of 'ft_connectivityanalysis' it has been mentions that 'coh' supports source data and I have no idea why I am getting the error. I am using the following code snippet for connectivity,

cfg = [];
cfg.method = 'coh';  % Compute coherence
cfg.complex = 'imag';  % Compute imaginary part of coherence
coh_results = ft_connectivityanalysis(cfg, source);

Can anyone please help me out to get it sorted?

Thanks in advance.


Best Regards,

Kaniska Samanta

PhD Researcher, Intelligent Systems Research Center (ISRC)

Ulster University

Derry~Londonderry, Northern Ireland, United Kingdom



[cid:40e862d6-5cac-486e-b593-25f0a9bbb7f0]     [cid:796d9406-87f6-4c1b-8dfd-cc1b3e4e00fb]




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