[Eeglablist] Reproducible ICA

[ivano triggiani]

Hi,

Try something like this:
rng(42); % Set seed before ICA
EEG = pop_runica(EEG, 'extended', 1);

Ivano
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*Antonio Ivano Triggiani, Ph.D.*


________________________________________________


On Mon, Jun 30, 2025, 3:57 PM Frühlinger, Christoph via eeglablist <
eeglablist at sccn.ucsd.edu> wrote:

> Dear all,
>
> I want to insert a random seed in my preprocessing script before the ICA
> to get reproducible results. I have tried several settings of the random
> seed at different locations in the script (at the top, right before the
> ICA, at the top of the pop_runica() function) as suggested in previous
> threads of the mailing list. However, I keep getting different ICA results
> for the same dataset. Some (potentially) relevant notes regarding the
> script: I use a parfor loop to call the actual preprocessing function like:
>
> ```
> parfor i_Sub = 1:length(Files)
>                 run_preproc()
> end
>
> function run_preproc()
>                 # basic preprocessing
>
>                 EEG = pop_runica(EEG, 'icatype', 'runica', 'pca', rank,
> 'extended', 1, 'interupt', 'off');
>
>                 # some more preprocessing
> end
> ```
>
> I would appreciate it if you could help me!
>
> Best wishes
> Christoph
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