MATLAB: I have to concatenate 6 .mat eeg files

concatenate data

I have to concatenate six .mat files that contains EEG data. The data has 8 channels and different samples.
I want to concatenate the data column wise so that there are 8 rows for channels and the samples keep on adding column wise.

Best Answer

filenames = {'first.mat', 'second.mat', 'third.mat', 'fourth.mat', 'fifth.mat', 'sixth.mat'};
nfiles = length(filenames);
data_cell = cell(nfiles,1);
for K = 1 : nfiles
    data_struct = load(filenames{K});
    %we do not know the names of the variable the data is stored in. 
    %assume it is the first variable in the file.
    fn = fieldnames(data_struct);
    this_data = data_struct.(fn{1});
    data_cell{K} = this_data;
end
%now put it all together into one matrix
data = vertcat(data_cell{:}) .';
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