[Eeglablist] Similar ICA components

[Mircea Stoica]

Dear Mahsa,

have you seen these?

https://sccn.ucsd.edu/wiki/Chapter_09:_Decomposing_Data_Using_ICA#How_to_deal_with_.22corrupted.22_ICA_decompositions
https://sccn.ucsd.edu/wiki/Chapter_09:_Decomposing_Data_Using_ICA#Issue:_ICA_returns_near-identical_components_with_opposite_polarities

Make sure that your data is full rank, free of non-stereotypical artifacts,
and maybe try AMICA in case the two components you showed come from
Infomax. Good luck!


Best,
Mircea

On Mon, Oct 9, 2017 at 8:17 PM, mahsa shalchy <mahsa.shalchy at gmail.com>
wrote:

> 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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