[FieldTrip] [problem] zero plv
Shen-Mou Hsu
explena at gmail.com
Thu Apr 12 10:57:44 CEST 2012
Dear Users,
I try to calculate the phase locking values following the tutorial and
encounter a problem.
First, I ran freqanalysis as follows:
cfg = [];
cfg.channel = 'EEG';
cfg.method = 'mtmfft';
cfg.foi = 8:1:120;
cfg.keeptrials = 'yes';
cfg.ouput = 'fourier';
cfg.tapsmofrq = 2;
Phase= ft_freqanalysis(cfg, data);
I noticed that the values in both Phase.cumsumcnt and Phase.cumtapcnt are
constant values (BTW, what the meaning of cumsumcnt and cumtapcnt)
Then, I ran connectivity analysis as follows
cfg = [];
cfg.method = 'plv';
PLV = ft_connectivityanalysis(cfg, Phase);
Here, I got empty matrices in both labelcmb: {0x2 cell} and plvspctrm:
[0x113 double]
I wondered if there is anything wrong with the previous steps. Many thanks!
Shen-Mou Hsu
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20120412/a9e16d7d/attachment-0001.html>
More information about the fieldtrip
mailing list