EEGlab ICAlabel not working with specific data

2020 8 21
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更新时间：2024 10 24
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I have 64 channel EEG data run through preprocessing steps before running ICA. I have run 18 datasets using the same process with no issues. I have 2 datasets where the ICA takes hours and then once the ICA is finished, this error occurs:
Error using ICL_feature_extractor (line 26)
Your ICA decomposition must be real to use ICLabel
Error in iclabel (line 52)
features = ICL_feature_extractor(EEG, flag_autocorr);
The data doesn't look any different than my other datasets. Any suggestions?

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Walter Roberson
Walter Roberson 2020-8-21
iclabel appears to be a third-party toolbox.
You could get that message if your ica generated nan or inf or complex values.
Rebecca Kenny
Rebecca Kenny 2020-8-21
Can you expand on what you mean by nan or inf or complex values? And how do I correct for that? Even the function in eeglab to "inspect/label components by map" doesn't work.
Still learning matlab and eeglab and I haven't seen this error before.
Walter Roberson
Walter Roberson 2020-8-21
What shows up for
nnz(~isfinite(EEG))
if the result is not 0 then you have samples that are infinite or Not A Number (nan). nan is often used to indicate missing data.
Moiz Ashfaque
Moiz Ashfaque 2024-10-24
Hi @Rebecca Kenny, did you get around to solve this error? I seem to be facing the same error with my 9 channels EEG data.

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