[Eeglablist] pop_epoch removing trials

[Tarik S Bel-Bahar]

Hello Jumana,

Two potential reasons are that
1. There are boundaries in some of the periods, which eeglab is skipping
when selecting which periods are okay to take as epochs.
2. I'm not sure, but it may be the case that eeglab does not allow the
epochs it's selecting to overlap. This is probably not the case.



On Tue, Jan 17, 2017 at 7:11 AM, Ahmad, Jumana <jumana.ahmad at kcl.ac.uk>
wrote:

> Dear EEGlab,
>
> I rejected continuous data, then ran AMICA.
>
> I also rejected eye related components.
>
>
>
> I started with 1400 events, but since I rejected continuous data this
> reduced to 1312 as expected.
>
>
>
> I then epoched the data. My trial length is typically 600ms, and I would
> want a -100ms baseline to +600, but followed EEGlab’s recommendation for
> TFA of -1 to 2s.
>
>
>
> pop_epoch():1312 epochs selected
>
> Epoching...
>
> pop_epoch():1312 epochs generated
>
> eeg_checkset: recomputing the ICA activation matrix ...
>
> eeg_checkset: found empty values for field 'value'
>
>               filling with values of other events in the same epochs
>
> eeg_checkset: found empty values for field 'urevent'
>
>               filling with values of other events in the same epochs
>
> pop_epoch(): checking epochs for data discontinuity
>
> Removing 59 trial(s)...
>
>
>
> I cannot figure out why 59 trials are being removed.
>
> Please could you advise me.
>
> Best wishes,
>
> Jumana
>
> *------------------------------------------*
>
> *Jumana Ahmad*
>
> Post-Doctoral Research Worker in Cognitive Neuroscience
>
> *EU-AIMS Longitudinal European Autism Project (LEAP) & SynaG Study*
>
> Room M1.09. Department of Forensic and Neurodevelopmental Sciences (PO 23)
> | Institute of Psychiatry, Psychology & Neuroscience | King’s College
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>
>
>
> *Phone:* 0207848 0260| *Email:* jumana.ahmad at kcl.ac.uk
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>
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