[Eeglablist] Issue interpolating channels

[Cedric Cannard]

Dear Ben,

Before rejecting channels, make a copy of the EEG data structure to store the channel locations and labels. Then, use it to interpolate the channels you rejected.

e.g.:
% store channel locations before rejection
oriEEG = EEG; 

% interpolate using the channel structure   
EEG = pop_interp(EEG, oriEEG.chanlocs, 'spherical');

Cheers,

Cedric Cannard



------- Original Message -------
On Wednesday, September 14th, 2022 at 10:17 AM, Swanson, Benjamin M via eeglablist <eeglablist at sccn.ucsd.edu> wrote:


> Hi,
> 
> We are having an issue interpolating channels. From a single dataset that was filtered and averaged referenced, 4 channels were removed (E44, E56, E57, E113).
> 
> After removing channels, we attempted to interpolate the channels using the "Interpolate channels(s)" tool. Then, under the prompt "What Channel(s) do you want to interpolate", we selected, "Select from removed channels". Now, only three electrodes (as opposed to the four we removed), appear and they are named differently from the ones removed (E2011, E2010, and E2002).
> 
> We attempted to interpolate based off these electrodes, and received the following warning:
> 
> "Warning: the size of the channel location structure does not match with
> number of channels. Channel information have been removed."
> 
> Any help is greatly appreciated,
> 
> Ben Swanson
> Lab Coordinator
> 
> Developmental Psychopathology Lab
> Spence Labs, Room 111
> University of Iowa
> P: (319) 353-1977
> E: devpsy-lab at uiowa.edumailto:devpsy-lab at uiowa.edu
> 
> 
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