[Eeglablist] external channel locations

[Raquel London]

Dear EEG labbers,

I am struggling with the channel locations. When I import them (Biosemi, 64
electrodes, 10/20 system) I use a file that only has the locations of the
64 electrodes. Once imported, the external channels are not there anymore.
However, I still need them to compute the bipolar VEOG and HEOG for the
ICA. I was wondering how I could solve this.

Does anyone have a channel location file I could use that includes external
electrodes?
Can I modify the file and add locations for the externals? If so, how do I
calculate the position or can I just invent something?
Or is there another way to keep the channels that have not been assigned a
location through the chanlocs file?
Or am I just thinking about this in the wrong way?

Any help is much appreciated!

Raquel
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20160725/9889ce68/attachment.html>