Flipping BioSemi EEG layout

[mcp0228]

@Francois

I'm sorry, I did not manage to follow what this "simpler" solution entails.

Apologies for not being specific.
I just meant that I will follow the steps below which to me seem simpler.

1. Use the uploaded custom ICBM152 EEG position channel for R to L-sided flipping when required.
2. Analysis pipeline.
3. Take the grand average across participants (which will cause the EEG electrodes to be positioned midline due to averaging) and just reload the EEG channel file ICBM152 > BioSemi > BioSemi 64 10-10 under Group analysis to the grand average ERP file. This will return the EEG positions to their appropriate locations.

I double-checked to see that this method still ensures correct data grand averaging.
Therefore I do not see anything wrong with this method - unless you can see anything wrong?

I didn't quite understand what you were trying to say here though.

@Francois

You need to flip the rows in the ERP data file and THEN replace the flipped channel file with the original channel file.