[Eeglablist] how to not lose the reference channel

[Rampone, Giulia]

Dear Makoto,

Thank you very much for your response. I apologise for being insistent but I still have a question.
Assuming I accept interpolation as the only solution, I do not have clear how to do.
I usually don't use the GUI. I do the interpolation for bad channels by using the command pop_Interp(EEG, [channel], 'spherical').
However, this works fine if the (bad)channel exists.
But in this particular case, Cz is removed from the data.
Once I set Cz as reference electrode, I move from 64 to 63 electrodes and channel 48 (which is usually Cz) becomes C2.

My question is, what I should add to the command in order to restore the Cz channel as channel 48 (even though as interpolated channel) and go back to 64 channels?

I hope this makes sense.

Many thanks

Giulia

On 22 Jul 2013, at 19:38, Makoto Miyakoshi <mmiyakoshi at ucsd.edu<mailto:mmiyakoshi at ucsd.edu>> wrote:

Dear Giulia,

After average referencing you can interpolate the channel to generate your reference channel from main GUI 'Tools' - 'Interpolate electrodes'. You need to have a dataset before rereferencing though to copy its channel info.

Makoto


2013/7/21 Rampone, Giulia <Giulia.Rampone at liverpool.ac.uk<mailto:Giulia.Rampone at liverpool.ac.uk>>
Dear all,

I have Biosemi BDF data file.  64 Channels and reference channel Cz.
My problem consists in retaining the reference channel in my data.
The older version of eeglab9_0_4_5s does that by default.
The version 11_0_4_3, instead, seems to separate the reference electrode from the others and, after computing the average reference, to definitively remove it.
I would like to know what I would be supposed to do to retain the reference channel in my data with this version.

I thank you very much for any help,

Best Regards

Giulia

Giulia Rampone, PhD student
School of Psychology
Eleanor Rathbone Building
University of Liverpool
Bedford Street South
Liverpool L69 7ZA

cell  0044 7449301514
e-mail giulia at liverpool.ac.uk<mailto:giulia at liverpool.ac.uk>
e-mail giuliarampone at gmail.com<mailto:giuliarampone at gmail.com>
skype giulia.rampone





_______________________________________________
Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu<mailto:eeglablist-unsubscribe at sccn.ucsd.edu>
For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu<mailto:eeglablist-request at sccn.ucsd.edu>



--
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20130723/dda99284/attachment.html>