[Eeglablist] importing events - latencies out-of-bounds

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Fri Sep 8 15:18:10 PDT 2017


If you haven't had a chance to, 1) review past eeglablist responses about
events and making new events, and 2) review online eeglab tutorials about
loading manual events.

In your case, would recommend just doing/computing all events outside of
eeglab, and then just loading one final file of events into your .set file.
another option is to loop through loaded events, and use scripts to
generate new events that are in the right time in the eeg record.

Since you are using the EYEEEG plugin, you may also want to check with the
developers of that plugin, as they may have some useful hints for you.

If you are matlab saavy (which it seems you are), you may also want to walk
through the code of the function that is throwing up the error/or/message
that you are getting, and try to better understand why it's  making the
decision to drop events.

Last, if you can replicate your error consistently with a few different
setups/event files, this may be a bug due to your somewhat complex
situation, and if so, you want to send it as a bug to eeglab bugzilla.

Overall, advanced data handling is not necessarily well supported in
eeglab, and requires a bit of extra work!

On Thu, Sep 7, 2017 at 5:26 AM, <keskinmer at itu.edu.tr> wrote:

> Dear all,
> I use EEGLAB with EYEEEG plugin, since I collected eye tracking and EEG
> data simultaneously with a synchronized set-up. I use BIOPAC Acqknowledge
> software for EEG data acquisition and SMI Experiment Suite for ET data
> acquisition. In Acqknowledge, it is possible to import SMI ET data together
> with the events and overlay them onto EEG data. Thus, it is possible to
> export events as excel/txt file. In EEGLAB, I establish synchronization of
> EEG and ET data through those shared events and I import the events
> manually, since they are txt files that have three coloums (latency, type,
> postion (all integers)).
> When I execute these steps with the whole EEG recording for one dataset,
> it works just fine. However, I have to use the certain parts of the data,
> not the entire record. Therefore, I split the EEG recording into parts. On
> the other hand, my event files remain same and include all the events for
> the enire record. In this case, when I try to import and synchronize ET
> data, I get this error:
> "11 out of 11 events had out-of-bounds latencies and were removed."
> ...which means none of the events are added, at the end. I tried to modify
> the parameter "align event latencies to data events" from "NaN" to "0" or
> positive and negative values, but I keep getting "no pre-existing values"
> error.
> I have no idea how to fix this and I would be extremely glad if someone
> suggest a solution.
> Thank you very much.
> Regards,
> Merve
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