[Eeglablist] ERSP before 500 ms

[Makoto Miyakoshi]

Dear Shingo,

If you are using the default setting, your window length should be 1116ms
or around (3 cycles at 3Hz). It means that you'll lose 1116/2 = 558 ms from
both ends of your epoch.  This is due to wavelet transform.

So, if you want to observe 300 ms and after, you should actually start
300-558ms = -258 ms.

Makoto


2013/8/22 Shingo Tokimoto <tokimoto at mejiro.ac.jp>

> Dear EEGLAB listers,
>
> I am examining the ERSPs of two conditions, and my concern is the
> difference of power spectrums between 300 and 600 ms of 3000 ms epochs.
> However, when I try to represent the ERSP of the time range of 300 ms long,
> the ERSP before 500 ms disappears. I am a beginner of EEGLAB, and I
> appreciate any suggestions. Thank you in advance.
>
> ************************************************
> Shingo Tokimoto, Ph.D.
> in Linguistics and Psychology
> Department of Foreign Languages
> Mejiro University
> 4-31-1, Naka-Ochiai, Shinjuku, Tokyo,
> 161-8539, Japan
> tokimoto at mejiro.ac.jp
> ************************************************
>
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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