Data Set I in GDF format for the BCI Competition III

Data set I - GDF format

The data is stored in the GDF format [1] and can be loaded into Matlab or Octave with Biosig-toolbox [2] (version 0.81 or higher) using the command [s,HDR] = sload(filename). All events are stored according to the Table of eventcodes [3]. The beginning of each trial (t = 0s according to Fig. 1) can be obtained from HDR.TRIG; the classlabels are stored in HDR.Classlabel, HDR.Classlabel can contain the values 1, 4, and NaN indicating "finger movement", "tongue movement" and "test trial", respectively. References:

[1] A. Schlögl, O. Filz, H. Ramoser, G. Pfurtscheller, GDF - A general dataformat for biosignals, Technical Report, 2004. Available online at: http://www.dpmi.tu-graz.ac.at/~schloegl/matlab/eeg/gdf4/TR_GDF.pdf.
[2] A. Schlögl, BIOSIG - an open source software library for biomedical signal processing. 2003-2004. Available online: http://BIOSIG.SF.NET.
[3] Available online: http://cvs.sourceforge.net/viewcvs.py/biosig/biosig/t200/eventcodes.txt.

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