[Eeglablist] is there pca in eeglab

[Tarik S Bel-Bahar]

Hello A S,
Some brief notes below. When you reach a solution that satisfies your
needs, please share it with the list so that other users can benefit from
it.

*There are functions named runpca and runpca2 in the eeglab distribution.
Review their documentation and test them out, as they may not be regularly
used.
*There is also Joe Dien's PCA toolkit:
https://sourceforge.net/projects/erppcatoolkit/
*There is also the following, which I believe uses Dien's tools or is a
replica of them https://github.com/krigolson/MATLAB-EEG-PCA-Toolbox
*There are also some PCA functions in the Fieldtrip LIte folder that is
part of the eeglab distribution (search for m files with pca in their title)

Also, ICA in eeglab is not just for removing artifacts. Many researchers
analyze the ICs themselves as indexes of unique neural sources.
>From my understanding, eeglab developers strongly recommend ICA and NOT
PCA, you can google "eeglablist + ICA + PCA" for past posts about that.
There is a PCA flag in the runica function in eeglab, but it will
essentially run ICA on PCA-reduced data.
The following recent article is interest,findable on google scholar: Artoni,
F., Delorme, A., & Makeig, S. (2018). Applying dimension reduction to EEG
data by Principal Component Analysis reduces the quality of its subsequent
Independent Component decomposition. *NeuroImage*, *175*, 176-187.





On Fri, Nov 23, 2018 at 12:00 PM A S <eng.emetsasa at gmail.com> wrote:

> Hi all,
> I know there's ICA in EEGLAB to remove artifacts. However I want to
> use PCA (Principal Components Analysis) to reduce the electrodes to
> spatio-temporal information according to the regions of interest. I
> can't find the PCA. Is there PCA in EEGLAB?
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20181123/94408e66/attachment.html>