Description

3d-coords.mat contains:
ctrs = XYZ coordinates of the centers of electrodes. This is NOT sorted according to electrode numbering.
ElecNames = The electrode names of the four corners and their corresponding INDEX in ctrs.
For instance, if electrode "G1" has index 27, G1's coordinates are ctrs(27,:).

3D Coordinates Plot.fig is a 3D plot of the electrode coordinates. The numbers are rounded and are for your convenience only.

Important: The electrode names in the ECOG data file are stored in the variable ChanNames. The channel indices in ChanNames and eeg have no relation to the indices used in ctrs. The channel indices in the ECOG data file are based on how we plugged them in the amplifier. On the other hand, the ctrs are arranged based on how Expectation-Maximization identified the voxel centroids. Therefore, please use electrode names (e.g. G1, G2, G3) when matching between these two. 

