EEG average reference off

Hi,

Our group would like to display EEG sensor ERP data with several SSPs applied to remove artifacts but without applying the average reference (it is more conventional in our field to display ERP sensor data with the mastoid reference used for online recording).

Has anyone figured out how to do this with mne_process_raw? When we use the --projoff flag it turns off the average reference and the SSPs that we want to include, but when we use the --projon flag it turns on the SSPs and the average reference together. We couldn't figure out a way to selectively turn off the average reference SSP.

thanks,
Ellen

hi Ellen,

maybe matti can add an option --no-eeg-avg-ref to mne_process_raw
otherwise mne-python can help as you know :slight_smile:

Alex

I don't have a file to test, but this is doable with mne_browse_raw
Adjust --> Projections

You then calculate the averages with as fine grained control as you
want with your projections. This is a bit more manual than normal.

There may also be a way to do this with the save projection options
and then incorporate it into mne_process raw (for more automated
control), or possibly deleting the projections in the raw file that
you don't want, but the first one should work

HTH
D