[FieldTrip] EEG data preprocessing

Martin Rosenfelder martin.rosenfelder at uni-ulm.de
Fri Jan 4 10:01:40 CET 2019


Dear Fieldtrip community,

I am analyzing time-frequency EEG data with respect to power spectra differences between an experimental and a resting condition. 
I am reading in the data from EGI raw files, which is then filtered and cut into trials (60 trials for each of the two conditions). The two conditions are then concatenated to one file using ft_appenddata. The output of the preprocessing is then passed to visual artifact rejection, an ICA and another visual artifact rejection. 
When trying to split the dataset into two conditions for multivariate analyses purposes, Fieldtrip throws an error saying that there are no event values in the data set any more. Splitting the data set into the two conditions does not seem to be possible any more. 

Is there a way to keep the event values during the artifact rejection so that the data set can be splitted into the conditions afterwards?

Thank you very much in advance for your time and effort! I appreciate any hint regarding the issue described above.

Best,
Martin

-- 
M.Sc.-Psych. Martin Rosenfelder
Wissenschaftlicher Mitarbeiter
Klinische und Biologische Psychologie
Universit├Ąt Ulm
Raum 47.2.259
+49 731-50 26592
martin.rosenfelder at uni-ulm.de





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