[Eeglablist] Trouble inserting Boundary Events at Selecting data

[Agustín Solano]

Thanks Tarik,

I followed your recommendation bue I am still not having what I think I
should have.

I loaded a dataset without any boundary event and then selected in the GUI
a portion of data, for example, points [10000 100000]. If I do that I think
eeglab should insert two events, one at the beginning and other to the end,
because I should be able to track if any data has been rejected. Is that
right? But when I do that no events are inserted.

On the other hand, if I select two portions of data, I get an event
corresponding to the rejected data between the two portions.

Maybe it is the way eeglab works but I am not sure I was clear at my first
question.
Thanks again!

2017-10-15 1:10 GMT-03:00 Tarik S Bel-Bahar <tarikbelbahar at gmail.com>:

> Hello Agustin.
>
> don't worry, one should be having no problem with this, rejecting of
> continuous works smoothly in eeglab.
>
> First reject the periods (pressing okay/reject in the GUI) and then make
> sure the file gets updated in memory (review eegh output after you do the
> rejection). Then reopen and view the continuous data. Do you see the
> boundary break events now ?
>
> Look into ur.epochs part of the EEG structure, which should contain start
> and end times for boundaries. I believe you can google tutorial information
> on urevent fields, etc...
>
> You should see the boundary breaks. Make sure to test this all with the
> GUI first, and if you are trying to use code instead of the gui, review the
> eegh output after various steps.
>
> Let us know of your progress.
>
>
>
> On Fri, Oct 13, 2017 at 1:13 PM, Agustín Solano <
> asolano at bioingenieria.edu.ar> wrote:
>
>> Dear community,
>>
>> I am working woth continuous sleep data. I have to Select Data
>> corresponding to different sleep stages and I need to track changes. Doing
>> some tests I realized that if I select a portion of continuos data I don't
>> get the Boundaries Events at the begining and at the end of the selected
>> portion (corresponding to the rejected data).
>>
>> In matlab Command Window I see the output (for example):
>>
>> *  eeg_insertbound(): 2 boundary (break) events added.*
>> *  eeg_checkset note: upper time limit (xmax) adjusted so
>> (xmax-xmin)*srate+1 = number of frames*
>> *  eeg_insertbound(): 2 boundary (break) events added.*
>> *  Creating a new ALLEEG dataset 3*
>>
>> But EEG.event is empty..
>>
>> Any ideas? Am I missing something?
>> Thanks in advance.
>>
>> --
>> *Bioing. Agustín Solano*
>> Instituto de Fisiología y Biofísica (IFIBIO) - Bernardo Houssay
>> Laboratorio de Fisiología de la Acción, Facultad de Medicina (UBA)
>> Paraguay 2155, Capital Federal
>> Buenos Aires, C1121ABG
>> Argentina
>> Tel: 54 11 5 950 9500 (2132)
>> http://www.physiologyofactionlab.info
>>
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>
>


-- 
*Bioing. Agustín Solano*
Instituto de Fisiología y Biofísica (IFIBIO) - Bernardo Houssay
Laboratorio de Fisiología de la Acción, Facultad de Medicina (UBA)
Paraguay 2155, Capital Federal
Buenos Aires, C1121ABG
Argentina
Tel: 54 11 5 950 9500 (2132)
http://www.physiologyofactionlab.info
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