[Eeglablist] electrode location coordinates

[Maro Machizawa]

Dear Johannes,

Thank you very much for your reply and the file, but I'm afraid M10 and M11 have different
arrangements; M10 is more like 10/20 system but M11 is equidistant system. I've got easycap's
theta/phi coordinates for M11; however, I am not quite sure how to implement those values into
EEGLAB.
I attached their M10 theta/phi coordinates file. Can anyone help me to create a location file out of
this?

Best regards,
Maro
----- Original Message ----- 
From: "Sarnthein Johannes" <Johannes.Sarnthein at usz.ch>
To: "Maro Machizawa" <m.machizawa at ucl.ac.uk>; <eeglablist at sccn.ucsd.edu>
Sent: Monday, December 18, 2006 8:10 AM
Subject: Re: [Eeglablist] electrode location coordinates


Dear Maro,
here is a .loc file I made for easycap M11,
maybe you can adapt it to M10.
Best,
Johannes


-----Ursprüngliche Nachricht-----
Von: eeglablist-bounces at sccn.ucsd.edu [mailto:eeglablist-bounces at sccn.ucsd.edu] Im Auftrag von Maro 
Machizawa
Gesendet: Mittwoch, 13. Dezember 2006 13:45
An: eeglablist at sccn.ucsd.edu
Betreff: [Eeglablist] electrode location coordinates

Dear Users,

I have a problem registering electrode location in EEGLAB. I have a set of theta and phi angles 
(coordinates); however, they don't match with EEGLAB's one.

I attached  a text file contains theta and phi coordinates. (we have easycap's M10 cap).
Theta is the angle between the Z-Axis and the connecting line from the origin of the coordinates and 
the electrode position. In the left hemisphere Theta is less than zero, in the right hemisphere it 
is larger.
Phi is the angle between: 1. the projection of the connecting line from the origin of the 
coordinates and the electrode position onto the XY-plane and 2. the X-axis. Phi is greater zero in 
the front right and rear left quadrant and smaller zero in the front left and the rear right 
quadrant.

I just need to input electrode locations in EEGLAB and create location file. If anyone can help me 
to go through this step, it will be greatly helpful.

Best Wishes,
Maro

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