[Eeglablist] topo2sph doesn't work correctly?

[Clemens Brunner]

Hi!

I'm having trouble converting my 2-D polar coordinates file (test.loc) into 
spherical coordinates. Basically, I want to use headplot, but the resulting 
3-D file seems to have the wrong electrode locations.

Here's a test file (test.loc) which contains 3 electrodes, one in the center 
of the circle (no. 2), one towards the right ear (no. 1) and one pretty close 
to the center shifted a bit towards the left ear (no. 3):

1  90 0.4  A...
2   0 0    B...
3 -90 0.05 C...

OK, now I'm converting it using:
topo2sph('test.loc','test3d');

The resulting file looks like this:

1  18 -90  A...
2  90  -0  B...
3  81  90  C...

Next, I'm drawing that file using:

headplot('setup','test3d','spline');
headplot([0.5,2,1],'spline');

And the resulting image doesn't show the 3 electrodes onto one line - one is 
around the vertex, one towards the right ear and one on the forehead.

Any hints how to solve my problem? Please reply directly to my email address 
since I didn't subscribe to the mailing list.

TIA,
Clemens