[FieldTrip] Equating power spectral density

[Chang, Ariel]

Hi all,

I don’t quite understand the effects of tapering for power estimates. I have resting data segmented into 2 second epochs. With the following parameters, could someone explain how to equate the data’s power spectral density back to it’s original spectral density (in the for loop)?


cfg.method = 'mtmfft';

cfg.taper      = 'dpss'

cfg.polyremoval = 1;

cfg.tapsmofrq = 1;

cfg.foilim    = [2 80];


cfg.pad= 100;


data2 = eeglab2fieldtrip(EEG, 'preprocessing');


sizedat = size(EEG.data);



    for i = 1:sizedat(3)

        data2.trial{i} = data2.trial{i}*10;

    End


[freq2] = ft_freqanalysis(cfg, data2);

Thanks in advance!

Best,

Ariel
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20160610/9d30cbb3/attachment-0001.html>