[FieldTrip] intertrial coherence estimation

[Laura Marzetti]

Dear all,

I want to compute the intertrial phase coherence and its variation across
trials with a one taper hanning approach as in



*cfg = [];*



*cfg.output     = 'fourier';*

*cfg.channel    = 'all';*

*cfg.method     = 'mtmconvol';*

*cfg.taper = 'hanning';*

*cfg.foi        = 5:2:80;*

*cfg.t_ftimwin  = 5./cfg.foi; *

*cfg.tapsmofrq  = 0.4*cfg.foi; *

*cfg.toi        = time_vect;*

*cfg.pad        = 'maxperlen'; *

*cfg.keeptrials = 'yes';*

*% cfg.keeptapers = 'no';*

*freqscprm = ft_freqanalysis(cfg, data);*

*tmpdat = freqscprm.fourierspctrm;*



*tmpdat = tmpdat./abs(tmpdat);*

*itc = abs(mean(tmpdat)); *





Nevertheless, the option *cfg.keeptrials = 'yes'; *does not seem to be
applied and the output is already the average across trials, e.g. of size
nfreq x ntimepoints and not of size ntrials x  nfreq x ntimepoints as I
would have expected due to the settings for *cfg.keeptrials.*



Can anyone suggest me how to manage the configuration in order to have
estimates in each trial as an output?



Thanks,

Laura

-- 
Laura Marzetti, PhD
Istituto di Tecnologie Avanzate Biomediche
Università di Chieti "G. D'Annunzio"
Via dei Vestini - Campus Universitario
66013 Chieti - ITALY

phone: 0039-0871-3556944
fax: 0039-0871-3556930
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