[Eeglablist] bad data rejection

[Makoto Miyakoshi]

Dear Iman,

> 1-      Is it possible to define more than one epoch in EEGLAB with
different pre/post stim time ?

No.

> 2-      If you want to reject bad data from the continuous dataset, it is
possible that you reject a segment of data which would be a part of an
epoch or even two  later.

Sure, but the imperfect epoch that does not have the full epoch length will
not be generated.

> -          How EEGLAB handle this issue?

By throwing it away.

> -          Also, it is possible that a bad segment is a part of two
epochs ( I am talking on continuous data before epoching though) ; for
example a bad segment could be a part of post-stim of epoch1 and pre-stim
of epoch2? What happens to event markers of those "tentative epoch"!

Sure, and in this case two overlapping epochs will be thrown away when
creating epochs.

Makoto

2014-02-27 13:10 GMT-08:00 Iman M.Rezazadeh <i_rezazadeh at yahoo.com>:

> Hi Makoto and EEGLABers ,
>
> A few  simple questions for you :
>
> Suppose that you have a *continuous* dataset which has *2 different
> stimuli* ( with different pre/post stim timing) on it and you want to
> clean bad segment of data on it first and then epoch it.
>
>
>
> 1-      Is it possible to define more than one epoch in EEGLAB with
> different pre/post stim time ?
>
> 2-      If you want to reject bad data from the continuous dataset, it is
> possible that you reject a segment of data which would be a part of an
> epoch or even two  later.
>
> -          How EEGLAB handle this issue?
>
> -          Also, it is possible that a bad segment is a part of two
> epochs ( I am talking on continuous data before epoching though) ; for
> example a bad segment could be a part of post-stim of epoch1 and pre-stim
> of epoch2? What happens to event markers of those "tentative epoch"!
>
> Best
>
> Iman
>



-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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