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Hi, <br>
we just started using EEGLab and came across some questions I find
no answer to in tutorials or the archive of this mailing list. So
hopefully, you could help us. We are absolute newbies, so the
answers may be quite easy but we just don't get there. We use the
GUI.<br>
<br>
We use BrainVision Recorder for recording EEG data and BrainVision
Analyzer to analyse them. Now, we want to analyse our data with
EEGLab. <br>
We can easily import the *.vhdr data from BrainVision Analyzer to
EEGLab, but we have problems with:<br>
<br>
1. Re-reference the data: we record the data with the left mastoid
as reference. We want to re-reference the data to the linked
mastoids offline, but we want to keep the TP9 in our data. We tried
Tools > Re-Reference > Re-reference data to channels "TP9",
Retain old reference channels in data, exclude the eog channels.<br>
As a resut, we have the TP9 left in the data, but its like a zero
line. So data is not referenced to our implicit reference TP10 and
TP9, but only to TP9? <br>
<br>
<br>
2. We tried to import data, which we already re-referenced in
BrainVision Analyzer, it didn't work. We exported the already
re-referenced data from BrainVision, getting an *.vhdr data as
well, but we couldn't open it with EEGLab. Error message: "EEGLAB
error on function pop_loadbva(): index exceeds matrix dimensions."
Any ideas, why we cannot import this data?<br>
<br>
3. we want to do an automatic artifact rejection. We want to try:
mark a segment as bad, if there are changes more than 50<i>μV </i>in
an intervall of 200ms. We couldn't find this criteria in EEGLab. You
have any ideas how to use this criteria?<br>
<br>
I apologize if these questions are too easy, but we couldn't manage
it on our own, so we hope to find some support here. As you may
have noticed, we are not used to work with EEGLAB, easy step-by-step
answers would be appreciated. :-)<br>
<br>
Thanks in advance, <br>
Christine Michel<br>
<br>
<br>
<br>
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