[Eeglablist] Importing events from Netstation

[Arnaud Delorme]

Dear Stephen,

I have copied your message to the talk page for importing EGI files.

http://sccn.ucsd.edu/wiki/Talk:Raw

Feel free to edit. If you feel that we could better handle the files in EEGLAB, please submit a bug report at http://sccn.ucsd.edu/eeglab/bugzilla (and upload a datafile with explanations).

Thanks again,

Arno

On 24 Oct 2012, at 13:54, Stephen Hamilton wrote:

> Dear all,
> 
> Apologies for my tardy reply to your helpful suggestions. In the end, we followed Gabriela Cruz's advice and performed segmentation mark-up in Netstation before exporting the data files into .raw format. This was mostly straightforward, but we did have some problems reading accuracy information from the TRSP events (given by Netstation) into EEGlab, particularly when these events occurred at recording boundaries. No error messages came up, we just noticed that there weren't enough trials in each condition and then saw that some TRSP events did not contain accuracy evaluations. As a consequence, most participants were missing 2 accuracy labels per recording. 
> 
> We determined the accuracy of these missing responses by inspecting the original event files given by NetStation. We then updated the eventlists produced by EEGlab by manually inserting correct and incorrect labels in place of the (empty) TRSP events. These modified event lists were then re-imported into EEGlab, and we were able to bin trials by accuracy and condition without any hassle. 
> 
> Thank you all for your help with this, we really appreciate it.  
> 
> S Hamilton    
> 
> On Tue, Sep 25, 2012 at 4:08 PM, Tarik S Bel-Bahar <tarikbelbahar at gmail.com> wrote:
> Hi, please let the list know of your final solution, here are some quick suggestions
> 
> 1. Search deeper into the eeglab list archives regarding importing/reading EGI/Netstation files/events.
> Alternatively search on google for a combination of "eeglablist" and "EGI/netstation/.RAW/events"
> To date (netstation 4.4 and back) only the main event labels are imported into eeglab
> and not the rich TRSP information. it's just a matter of formats, etc..
> 
> 2. The new Netstation (5.0?) has a new format which will purportedly allow 
> for easy recognition of the dense TRSP information that is available in Netstation files.
> See also EPToolkit (and eeglablist archives on EPtoolkit)
> 
> 3. One alternative is to export your events from netstation as a separate text file,
> and then, via your own script, coordinate the events/TRSPs information from this text file
> with your eeglab file.
> For example, if you 1000 events in your file, each with multiple TRSP fields,
> you would simply have to, with matlab, import your netstation events file,
> and then find the 1st event in eeglab, the 1st event in your events file (in matlab now),
> and then add fields of choice to your eeglab file from the events file.
> 
> This solution is for continuous data from Netstation, 
> but this should also work with epoched data from NS imported into eeglab.
> 
> 
> 
> 
> On Thu, Sep 20, 2012 at 6:14 PM, Stephen Hamilton <sthamilton at ucdavis.edu> wrote:
> Dear all,
> 
> This is probably a very simple question with a straightforward answer, but I can't find it mentioned in previous posts. Apologies if I've missed it.  
> 
> I'm importing data recorded in Netstation (128 channel EGI system) into EEGlab so that I can reject artifacts using ICA. With Netstation, events are written into the .RAW files themselves, so I'm able to segment the data by condition very easily. However, I'm unable to distinguish correct trials from incorrect trials. When I try to import the event file given by Netstation, EEGlab doesn't like the fact that it's in string format. So, I've tried assigning events manually using the eventlist GUI provided by the ERPlab toolbox, but I'm unable to get it to read the accuracy information. This is, I think, because EGI/Netstation evaluates trial accuracy with TRSP events at the end of each trial and these evaluations are not tied to the condition labels themselves. If I open the Netstation event file the TRSP evaluation ("eval1" or "eval0") is provided at the end of the line for that event,  I just can't get EEGlab to read it. It's probably just a matter of tying these together in the Binlister somehow, but I can't find an example of how this is done. 
> 
> Again, sorry if this has been answered before. Any help would be much appreciated! 
> 
> S Hamilton 
> 
> 
> -- 
> Dr. Stephen Hamilton
> Postdoctoral Researcher
> Language Processing Lab
> University of California, Davis
> 
> 
> 
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> 
> 
> 
> -- 
> Dr. Stephen Hamilton
> Postdoctoral Researcher
> Language Processing Lab
> University of California, Davis
> 
> 
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