[Eeglablist] Problem Importing Brain Vision Pycorder files

[Andreas Widmann]

> Thanks so much! Do you happen to know how to get the channel locations for Brain Vis, as well? I tried using the standard BESA file like I did with the 32 channel Neuroscan system I used to use, but it doesn't seem to autodetect the channel locations for this system. I'm guessing I need a different file specific to the Brain Vis data?
Your header file (vhdr) only contains generic channel labels (Ch2, Ch3, …). There is no way to load standard electrode locations without specifying channel labels. You have to define the channel labels according to your electrode cap layout and channel assignment in the settings of your PyCorder recording software. 

Hope this helps,
Andreas

> Kira
> 
> 
> On Wed, Jun 22, 2016 at 1:54 PM, Andreas Widmann <widmann at uni-leipzig.de> wrote:
> Hi Kira,
> 
> > I am using Brain Vision Pycorder to record EEG, and I am having some difficulty getting the data to visualize correctly in EEGLab. I have tried importing the data using the BIOSIG interface and the Brain Vis Rec.vhdr plugin both with the same result. Basically, all of the information about the dataset looks correct, but when you plot the data it looks as if channels are missing. We know these channels weren't missing when we recorded. Here is a link to one of our data files: https://drive.google.com/a/owu.edu/folderview?id=0B3AY5KURwf-_SkdvVG5scHU1cG8&usp=sharing
> The data look ok and all 32 channels are imported (using „From Brain Vis. Rec. .vhdr file“ method; did not test BIOSIG). The data have a strong DC offset. When plotting please try first menu Display -> Remove DC offset (channels are basically plotted outside of the window and thus invisible). Alternatively you may apply a high-pass filter before plotting and further analysis. Note: the vmrk files actually do not include any markers. Thus, no triggers will be imported.
> 
> Hope this helps,
> Andreas
> --
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> 
> 
> -- 
> Kira Bailey, PhD
> Assistant Professor
> Department of Psychology
> David O. Robbins Neuroscience Program
> Ohio Wesleyan University
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