[Eeglablist] Large data file appears empty

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Sep 2 10:36:22 PDT 2015

Dear Lexie,

I have an experience of importing 64-channel ABR data sampled at 5k or
around (I forgot, could have been higher?) Imagine how big the data were!
Probably more than 10 times larger than yours, but I did not see any
problem in importing it.

> However, when we import the vhdr files into eeglab, it looks like there's
no data there.

How did you judge that? Does EEGLAB main window says 0MB?


On Tue, Aug 25, 2015 at 8:41 AM, Lexie Tabachnick <ltabachnick at gmail.com>

> We have been running an experiment trying to collect ABR data using the
> Brainvision EP-PreAmp and Actichamp system. We ran several successful tests
> with short versions of our experiment, about 10-15 minutes of recording. We
> were able to process the data in eeglab and saw the components we were
> expecting.
> We have recently been running our full experiment, recording for about
> 45-50 minutes. The files are necessarily much bigger. The test .eeg files
> were ~150mb and the full .eeg files are ~550mb. All of our Brainvision
> equipment seems to working (amps, batteries, electrodes), and we are able
> to get our impedances low before recording. However, when we import the
> vhdr files into eeglab, it looks like there's no data there. We are
> thinking this might be an eeglab problem - perhaps the file is too large
> and something's getting lost in the import?  Any advice would be greatly
> appreciated.
> Thanks!
> Lexie
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu

Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20150902/0a332b78/attachment.html>

More information about the eeglablist mailing list