[Eeglablist] Help with Interpolating Bad Channels after ICA

[Makoto Miyakoshi]

Hi Komal,

You can perform channel interpolation, but you cannot tell ICA about it.
Technically, EEG.icasphere and EEG.icawinv contain channel indices when ICA
is applied. When your current channel structure is updated, you need to
make the corresponding changes to these matrices, but you cannot do it. You
need to run ICA again.
Because of this dependency, I recommend channel interpolation before ICA.
When applying ICA, you need to specify the data rank too.

Makoto

On Tue, Sep 17, 2024 at 1:00 PM Komal Komal via eeglablist <
eeglablist at sccn.ucsd.edu> wrote:

> Hi All,
>
> I hope you are doing well.
>
> I need some guidance on interpolating bad channels after ICA. After
> removing components 1 and 5 (due to eye blinks) and clicking on *"Select
> Removed Channels"*, another window pops up asking for the *data index*. I
> am unsure what the correct data index should be. When I try inputting 1 or
> 5, it doesn't seem to work.
>
> Any help or advice on how to proceed would be greatly appreciated.
>
> Looking forward to hearing from you.
>
>
>
>
>
> regards,
>
> Komal
> [image: image.png]
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