[FieldTrip] Apply new ref to selected chans only

[Blume Christine]

Dear Stephen and Arjen,


Thanks a lot for your suggestions. Exactly, I am just pre-referencing them for visualisation purposes and therefore need others to be not re-referenced. As I also filter the signal differently depending on the channel type, I am doing the separation-concatenating approach. Just thought there might be something "hidden" I did not know about.


Thanks a lot!


Best,

Christine

<http://www.sleepscience.at/>
<http://www.sleepscience.at/><https://ccns.sbg.ac.at/>
________________________________
Von: fieldtrip <fieldtrip-bounces at science.ru.nl> im Auftrag von Stephen Whitmarsh <stephen.whitmarsh at gmail.com>
Gesendet: Montag, 15. Juli 2019 17:41:59
An: FieldTrip discussion list
Betreff: Re: [FieldTrip] Apply new ref to selected chans only

Dear Christine,

If you want to keep your 'unreferenced' or rather 'pre-rereferenced' channels, you could just add them from the state before re-referencing. Or preprocess a set of channels separately and concatinate them later. Note sure why you would like to do that though as you would be ending up with channels with different referencing schemes. In any case, per default you lose your reference channels, as they will (average to) zeros anyway.

Also see:

   cfg.implicitref   = 'label' or empty, add the implicit EEG reference as zeros (default = [])

Hope this helps,

Stephen

On Mon, 15 Jul 2019 at 15:35, Blume Christine <christine.blume at sbg.ac.at<mailto:christine.blume at sbg.ac.at>> wrote:
Dear FieldTrippers,

I am asking myself (& the code, both without success) whether

i) the new reference in ft_preprocessing is also applied to the original reference channels (which in the case of linked mastoids is not desirable) and if that is the case, ii) whether the code allows to only apply the new ref to specific channels only. Any ideas are appreciated!

Best,
Christine

Sent from my iPhone
_______________________________________________
fieldtrip mailing list
https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
https://doi.org/10.1371/journal.pcbi.1002202
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20190715/a9ab9c9e/attachment-0002.html>
-------------- next part --------------
_______________________________________________
fieldtrip mailing list
https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
https://doi.org/10.1371/journal.pcbi.1002202