[Eeglablist] ICLabel eeg_rpsd indexing error and a proposed solution

[Makoto Miyakoshi]

Dear Edward,

Very nice troubleshooting Edward!
I appreciate you taking the effort to share it with us.

Makoto

On Fri, Feb 24, 2023 at 11:58 AM Edward Cheng <b99401015 at ntu.edu.tw> wrote:

> To whom it may concern,
>
> I found an indexing error in ICLabel while processing eeg files in edf
> format with different sampling frequencies.
> -> For the EEG.srate = 200 ones, the Automagic runs without a hitch.
> -> However, for the EEG.srate = 1000 ones, although runICA goes smoothly,
> but the ICLabel give the following error: (eeg_rpsd.m, line 35, index in
> position 2 is invalid)
>
> [image: Screen Shot 2023-02-24 at 1 51 32 PM]
> <
> https://urldefense.com/v3/__https://user-images.githubusercontent.com/126083032/221108494-efd9122c-e8d1-45a9-ad21-873a9f6099de.png__;!!Mih3wA!HXfByr0hKiA6R4jLQgv2szujtn5SZEraBVy9mqegt0fM0NCfBTIli2zkU1lORTat6UXfgPPIiUX-znYThhFyBrW8_kY$
> >
>
> Later, I found that in the eeg_rpsd.m file, when EEG.srate is 1kHz, the
> n_points variable becomes 1E3, which is treated as a float rather than an
> integer, causing subsequent indexings to fail.
>
> A solution is proposed: add line 17 as shown in the next picture (n_points
> = round(n_points)
> [image: Screen Shot 2023-02-24 at 2 26 11 PM]
> <
> https://urldefense.com/v3/__https://user-images.githubusercontent.com/126083032/221109230-28944d47-5d79-4fb5-9d8a-e31e7ea15776.png__;!!Mih3wA!HXfByr0hKiA6R4jLQgv2szujtn5SZEraBVy9mqegt0fM0NCfBTIli2zkU1lORTat6UXfgPPIiUX-znYThhFyYHAQrek$
> >
>
> I had also raised an issue on the sccn/ICLabel github page, but because
> seeing that previous issues from the last year are not closed, I am
> reposting it here for anyone interested.
>
> Best regards,
> Edward Cheng
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