What method can I use to label EEG files? For example, I want to add gender and age information to an EEG file.Or add the degree to which the tester has rated their current emotions？
“I’m sorry my English is not very good, this is machine translation.”
It would depend on your file format. For FIF files (.fif), you can save a limited amount of information in the info object. See here:
on that page, just search for subject_info. Adding some external ratings to the file could be done via separate events? … or as metadata if you have epoched data.
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