[Eeglablist] g.Recorder hdf5 files into EEGLAB, ERPLAB

Arnaud Delorme arno at ucsd.edu
Thu Nov 6 02:16:54 PST 2014


Dear David,

In addition to Makoto recommendation, the E-prime files should have exact latencies in milliseconds. You may simply align these events with your EEG data and compute the EEG sampling rate.

Arno

On Oct 21, 2014, at 1:00 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:

> Dear David,
> 
> Usually, EEG sampling rate is either 250, 256, 500, 512, 1000, 1024, and any higher freqs than this is rarely used.
> 
> To make a rough estimate... If the task is with any visual presentation you can use occipital visual potential as the reliable marker. I would set it to 500 for starting and run ICA to find occipital alpha peak in the IC spectrum, and if the peak is around 8-12 you are fine (I don't think you can distinguish 500 from 512 or 1000 from 1024 in this 'method') if it is 4-6 or 16-24 then you want to half/double the sampling rate.
> 
> Makoto
> 
> On Fri, Oct 17, 2014 at 3:33 PM, David Ryan <ryand1 at goldmail.etsu.edu> wrote:
> Hello,
> 
> I have been given the task of analyzing data salvaged from a broken hard drive, from a study done a few years ago. I have g.Recorder hdf5 files that need artifact rejection (eye blink, eye movement) and ERPs that need to be extracted from 4 different triggers from E-prime. 
> 
> I have read on this list that it is simple to get these files imported into EEGLAB; however, I do not know the sample rate or other simple characteristics of these files. 
> 
> Does anyone have any suggestions?
> Thanks,
> Dave
> 
> 
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> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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