[FieldTrip] ft_connectivityanalysis output is empty

[Carolina Ogawa]

Dear community,

I'm trying to run the ft_connectivityanalysis function, however, its output
is empty (wpli_debiasedspctrm: [0×41×11 double]). I wondered if this
problem was due to the cfg.output or cfg.method selected for the
ft_freqanalysis, but none of my attempts has worked so far as I keep
getting the same problem, i.e. empty output from ft_connectivity analysis.

Any help would be appreciated!

Thank you,
Carolina Ogawa

====================================================

Here's my script:

% Compute time-freq representation
       cfg            = [];
       cfg.output     = 'pow'; OR 'fourier' => I tried both
       cfg.channel    = 'all';
       cfg.keeptrials = 'yes'; % keep individual trials
       cfg.method     = 'wavelet'; OR 'tfr' => I tried both
       cfg.foi        = 30:0.5:50;          % Freq of interest
       cfg.toi        = -0.1:0.05:0.6;        % Epoch limits
       cfg.width      = 12;

 TF_data = ft_freqanalysis(cfg, raw_data);

% Select time interval of interest
    cfg             = [];
    cfg.latency     = [0 0.500]; % evoked and induced gamma time window
    cfg.avgovertime = 'no';
    epoch           = ft_selectdata(cfg, TF_data);

% Compute dwPLI (ft_connectivityanalysis)
    cfg             = [];
    cfg.method      ='wpli_debiased';
    dwPLI1          = ft_connectivityanalysis(cfg, epoch); ==>
dwPLI1.wpli_debiasedspctrm: [0×41×11 double]
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