[Eeglablist] Splitting epoched datasets

[Adam Grinberg]

Thanks, Cedric.

Unfortunately, this doesn't help for what I need to do. The ERP comparison is not the problem as I already managed to do this using ERPLAB. I did define the two conditions using their 'code' (using categorical). However, when I plot the IC clusters, the GUI plots all of the data concatenated and does not consider the different conditions.
There really should be a way of creating separate plots and each conditions... It seems kind of basic...
Could not find it yet. It's either this or splitting the dataset. But like I said, I need to make sure that the ICA weights are changed accordingly for each sub set.

/Adam

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________________________________
From: Cedric Cannard <ccannard at protonmail.com>
Sent: Monday, May 22, 2023 11:58:30 PM
To: Adam Grinberg <adam.grinberg at umu.se>
Cc: eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] Splitting epoched datasets

Dear Adam,

You do not need to separate them for STUDY. As long as your markers indicate which condition the trials are, simply leave the condition field empty during STUDY info window (where you import the files into a STUDY), and go to Study design and select your 2 conditions (select categorical).

Then, precompute, and you can run some basic stats in STUDY > plot channel measures > STATS > check "compute 1st independent variable statistics"
Adjust other parameters at will, and you should be able to see ERP of each condition and differences if any.

I don't know if that is compatible with the analysis you want to do though. I haven't tried source reconstruction from components in STUDY mode yet.


Cedric


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------- Original Message -------
On Monday, May 22nd, 2023 at 12:11 PM, Adam Grinberg via eeglablist <eeglablist at sccn.ucsd.edu> wrote:


> Hello,
> I am conducting an ERP study with two conditions, currently analysed using ERPLAB for wavforms and scalp topographies.
>
> However, I wish to add source reconstruction on independent components using eLORETA. For this, I need to use the EEGLAB study feature, so I can create clusters of ICs. Now, from what I understand, EEGLAB studies require each condition to be on a separate dataset.
> I currently have my epoched data in one dataset (both conditions).
> Is there a way to somehow divide the dataset while retaining ICA information? (I need the ICA weights to be updated for each dataset).
>
> Thanks!
>
> /Adam
> ______________________________________________________________________________________
> Adam Grinberg, PT, PhD
> Department of Community Medicine and Rehabilitation, Physiotherapy
> Umeå University
> Umeå, Sweden
> Tel: +46 (0) 90 786 96 30
>
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