[FieldTrip] concatenating data to a single trial data set
a.wollbrink at uni-muenster.de
Mon Jun 20 14:45:54 CEST 2011
in order not to run into a RAM memory overload when performing an ICA on
MEG data I subdivided the raw data into several equally long segments
(chops) using ft_preprocessing with varying cfg.trl settings.
After applying ft_componentanalysis to each of these chops I removed
some (bad) components and backprojected the data to seperate data
matrices using the following code:
cfg = ;
cfg.component = badCompVec; % to be removed component(s)
dataCorr = ft_rejectcomponent(cfg, compData);
Finally I like to concatenate these data to a continuous (single trial)
data matrix in order to compare it with the original raw data set and
perform the further timelock analysis on it.
I tried using ft_appenddata for this issue. Doing so one gets a multi
trial data matrix which I could not convert to single trial continuous
data matrix using e.g. ft_redefinetrial.
I would appreciate any help in how to solve this problem.
Thanks in advance.
Andreas Wollbrink, Biomedical Engineer
Institute for Biomagnetism and Biosignalanalysis
Muenster University Hospital
Malmedyweg 15 phone: +49-(0)251-83-52546
D-48149 Muenster mobil: +49-(0)160-98527553
Germany fax: +49-(0)251-83-56874
e-Mail: a.wollbrink at uni-muenster.de
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