[FieldTrip] Cluster P-value and T-vlaue in ft_freqstatistics
Hossein Abbasi
hosseinabbasi000 at gmail.com
Sun Dec 4 19:59:24 CET 2022
Dear Fieldtrip list,
I have planned to use the ft_freqstatistics function to find significant
clusters of difference between two conditions (Cond_A vs Cond_B). I focus
only on three electrodes, and only the time-frequency space matters to me.
That is, I would like to see which time-frequency clusters differ between
the two conditions.
When I look at the results, I do see significant time-frequency clusters,
but I do not see any report about the P-values and T-values of the
clusters. Is there any way to get the cluster P-value and cluster T-value?
This is the code that I am using:
cfg = [];
cfg.channel = {'O1','O2',Oz'};
cfg.latency = [0 1];
cfg.frequency = [3 35];
cfg.avgoverfreq ='no';
cfg.avgoverchan ='yes';
cfg.parameter = 'powspctrm';
cfg.method = 'montecarlo';
cfg.statistic = 'ft_statfun_depsamplesT';
cfg.alpha = 0.05;
cfg.numrandomization = 10000;
subj = 20;
design = zeros(2,2*subj);
design(1,:) = [1:subj 1:subj];
design(2,:) = [ones(1,subj) ones(1,subj)*2];
cfg.design = design;
cfg.uvar = 1;
cfg.ivar = 2;
[stat] = ft_freqstatistics(cfg,Cond_A,Cond_B);
Thanks a lot for your help and looking forward to receiving your
suggestions.
Best, Hossein
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