[FieldTrip] Referencing

[Hwee Ling Lee]

Dear all,

I have 4 electrodes, and I would like to reference my data by subtracting
from the neighbouring electrode. In other words, E2-E1, E3-E2, E4-E3.

I was wondering if there is an easier way in fieldtrip to perform this
calculation, and then to change the data structure with these new channel
labels.

Thanks.

Cheers,
Hweeling
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