[Eeglablist] After epoching data the EEG.event is empty []

[Sahar Selim]

Dear all,

Thanks for trying to help

These are the details of my steps: *(Check Screenshots of my steps)*

*Steps of loading data in EEGLAB*
1) File -> Import Data -> Using the BioSig Interface

2) Choose a data File: BCI Competition Dataset IV 2a-> A01T.gdf

3) Pop_biosig() : Select Channels 1,10,20

4) Tools -> Extract Epochs: Specify [start & end] seconds

5) Select Event Types : Motor Imagery Events 769, 770, 771, 772

6) Save new Dataset

7) Remove Baseline


Events appear to be none :(

I tried

EEG = eeg_checkset(EEG, 'makeur');
But my problem is that when I epoch data the event is none not the urevent

Even though epochs appear to be 288 epochs they appear as an empty set in
the matlab

please tell me if I'm missing anything

*Screenshots of my steps*

https://www.dropbox.com/s/fsm4bik8aktgzex/EEGLAB%20Commands%20for%20extracting%20Epochs.pdf?dl=0

or

https://www.mediafire.com/?rj74g47okmfddqq

On Tue, May 5, 2015 at 4:52 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
wrote:

> Dear Sahar,
>
> Sorry for the trouble.
> I can't think of any reason for it though.
> Looks like you manually tried to take care of EEG.urevent (your
> description seems interrupted by the way) but it's better to leave EEGLAB
> to take care of it. If you want to make it, use EEG = eeg_checkset(EEG,
> 'makeur'); (or something like that) to force EEGLAB to recreate it.
>
> To let us troubleshoot the problem, you should tell us more detail about
> the process you take. Generally speaking, I don't hear very often about the
> trouble in managing events.
>
> Makoto
>
>
>
> On Wed, Apr 22, 2015 at 10:48 AM, Sahar Selim <sahar.soussa at gmail.com>
> wrote:
>
>> Hello
>>
>>
>>
>> I'm using BCI competition IV 2a. I've loaded my data using the EEGLAB.
>> At this point the EEG.ur = EEG.event
>>
>>
>> My problem is that after epoching the dataset the EEG.event is empty []
>>
>>
>> I need to know the corresponding event of each epoch & the corresponding
>> latencies of these events
>>
>>
>> Thanks in advance
>>
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>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>
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