[Eeglablist] Trouble with EGI multiple seg. files

[Tarik S Bel-Bahar]

My apologies Mikaela, to clarify, I meant a 1 hz highpass to cut out slow
drift, or a 1hz to 40hz bandpass,
and not a lowpass. This is ideally done on continuous data. Hope you got
through that part of your pipeline!

On Thu, Jan 28, 2016 at 9:05 AM, Tarik S Bel-Bahar <tarikbelbahar at gmail.com>
wrote:

> Hello Mikaela, for now go ahead and try it this way first:  load each file
> one at a time into eeglab memory, and then append the files into one file,
> all using the gui. see if you get the same issues in the resultant file.
>
> Have you ever seen this import step work normally ? If you havent, Try to
> make sure that you can do all these steps  with the GUI first, and are
> familiar with the tutorial and wiki. Too many people try to just hack
> through using the command line and script without practicing first, without
> working with test data, gui, etc..
>
> You also are at least doing a lowpass before viewing, right ?
>
> Last, The multifile egi file import in eeglab may have a bug. Also the
> file names of the mltiple files need to be very specifically named in
> sequence. Please also search review past eeglab list messages. If you can
> replicate the issue, please document it and pass to eeglab bug list if
> necessary.
>
>
> On Jan 28, 2016 1:37 AM, "Mikaela Joy Cowen" <mcowen at uwyo.edu> wrote:
>
>> Hello,
>>
>> Our lab has been collecting simple resting state EEG data for a frontal
>> asymmetry paradigm using an EGI system. We are running into problems when
>> we are importing multiple seg. files into eeglab. At first glance, the
>> scroll data looks fine, but when we look at the spectra data it isn't
>> looking right (extremely low power values, and no "alpha bump" from 8-12
>> hz). When we imported one segment without the others as a simple binary
>> file, the data was looking more accurate. Any ideas what could be going on
>> with this? At first we thought that the small power values might be a
>> scaling problem, but we're not sure.
>>
>>
>> Any help would be much appreciated!!
>>
>>
>> Mikaela Cowen
>>
>>
>> ___________________
>>
>> Mikaela Cowen, M.A.
>>
>> Department of Psychology
>>
>> Biological Sciences Room 103
>>
>> University of Wyoming
>>
>> 1000 E. University Ave.
>>
>> Laramie, WY 82071
>>
>>
>>
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