[Eeglablist] Similar ICA components

Akshay Maggu 1155037837 at link.cuhk.edu.hk
Wed Oct 11 19:26:15 PDT 2017

Dear Mahsa,
Is the data in the "time.png" (of the folder that you sent) component data?
If yes, then I see that component 3 and 4 are quite noisy. Was the data
cleaned (hand-cleaned, line-cleaned) before it was fed to the ICA? If all
precautions taken at the start of ICA, I would rather reject these ICs 3
and 4 (of course it also depends on the expt aims).

So, to your answer, not so sure where they coming from, but sure they look
quite noisy and artifactual.


On Tue, Oct 10, 2017 at 2:17 AM, mahsa shalchy <mahsa.shalchy at gmail.com>

> Dear Experts,
> I collected some data using Biosemi system (32 channels) and after doing
> pre-processing steps (resampling, filtering, re-referencing), I epoched the
> data and applied ICA.
> My problem is that, I'm getting two similar components in my ICA results
> (IC3 and IC4).
> I uploaded related images here:
> https://www.dropbox.com/sh/etjkwjrse12lu5j/AABpJvKmKWY5n69eER1GrPGka?dl=0
> Could you please help me with this?
> Many thanks,
> Mahsa
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Akshay Raj Maggu
Laboratory for Language Learning and the Brain
Department of Linguistics and Modern Languages
The Chinese University of Hong Kong
Hong Kong
Web: http://www.cuhk.edu.hk/lin/new/people/students/maggu/
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