[FieldTrip] Marker in the EEG raw data

[Elif Tülay]

Dear Nazmiye,

If we assume that you read the data correctly, I have one suggestion which
is not be a good and professional one but it solved my problem temporarily.

I also experienced this problem and used the older version (very old :)) of
fieldtrip toolbox just for ft_databrowser function that help to visualize
the data with markers. I guess that you could store the markers in
fieldtrip structure (you can check this info from ---> data. trialinfo for
your data) but there is something wrong in newest versions when you want to
vizualize them. I actually do not know what is the reason and I could not
have enough time to find it. Probably more technical solutions will come
from the developers but this can be a quick way to solve your problem.

However, please also check your code for reading the data. Did you define
the marker name by using cfg.trialdef.eventvalue? If you share at least
your data reading script with the community, more solutions could come up.

I hope one of them works for you.

Best

On Fri, Oct 27, 2023 at 1:10 PM Nazmiye Kurdoglu Turhan via fieldtrip <
fieldtrip at science.ru.nl> wrote:

> Dear community,
>
> I am a master's student at Paderborn University and doing my internship
> at Münster University. I have resting state EEG data, and normally there
> is a marker which shows the beginning of the fixation point in the raw
> data. However, it is not visible on FieldTrip even though I loaded the
> eeg, vhdr and vmrk files. I checked the vmrk file on Matlab and can see
> the marker information there. I also checked the data on eeglab to be
> sure there is a marker, and there is. How can I make the marker visible
> in FieldTrip?
>
> Excuse my question if it is too easy; I am pretty new to FieldTrip.
> Thank you very much in advance.
>
> Sincerly,
> Nazmiye Kurdoglu Turhan
> _______________________________________________
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> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> https://doi.org/10.1371/journal.pcbi.1002202
>
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