[FieldTrip] Fast Fourier Transform Using EEGLab

[Peyton Finley]

Hello,

My name is Peyton Finley and I am an undergraduate research student at
Wheaton College in Wheaton, Illinois. I am emailing you regarding how to
conduct a Fast Fourier Transform using FieldTrip.

Specifically, I am trying to use the function ft_freqstatistics.m to gather
statistics for the FFT. The function requires what is noted as a "design
matrix". This is the description:

Nxnumobservations: design matrix (for examples/advice, please see the
Fieldtrip wiki,
                                  especially cluster-permutation tutorial
and the 'walkthrough' design-matrix section)

I checked the FieldTrip wiki site, but I was unable to find anything on
this design matrix. What is the design matrix and how do I construct it?

Also, is this the correct way of performing a FFT on EEG data? Is there an
alternate method? Before arriving at this point, I have performed the
following steps.

cfg = [];
ft_defaults;
cfg.dataset = dataset;
preprocdata=ft_preprocessing(cfg);
data=struct2single(preprocdata);

%% Define cfg for ft_frequanalysis.m and run.
cfg = [];
cfg.output='fourier';
cfg.method='mtmfft';
cfg.outputfile=outputFileName;
cfg.foilim=[0 55];
cfg.tapsmofrq='2';
[freq]=ft_freqanalysis(cfg,data);

%% Define cfg for ft_freqstatistics.m and run.
cfg = [];
cfg.method='analytic';
[stat]=ft_freqstatistics(cfg, freq);


Sincerely,
Peyton Finley
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20151029/3b5c834c/attachment-0001.html>