[Eeglablist] question for overlapping in Spectopo()

[#SHAN XIN#]

Dear Arno,

Since it says [integer], does this imply that if I want to have a 50% overlap, I need to pass "'overlap',50" instead of "'overlap', 0.5" to the function? Or other number format?

Thanks!
Shan Xin

Arnaud Delorme <adelorme at noetic.org<mailto:adelorme at noetic.org>> ? 2015?8?6? 01:12 ???

Dear Makoto,

Yes this is what it means.

Arno

On Aug 5, 2015, at 10:03 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu<mailto:mmiyakoshi at ucsd.edu>> wrote:

Dear Arno,

>  'overlap'  = [integer] window overlap in data points {default: 0}

Does this mean by default there is not overlap in spectopo()? I guess it uses windowing function. Windowing with no overlap?

Makoto

On Wed, Aug 5, 2015 at 3:10 AM, #SHAN XIN# <SHAN0055 at e.ntu.edu.sg<mailto:SHAN0055 at e.ntu.edu.sg>> wrote:

Dear Makoto,


There were some discussions  in archives about overlapping for Spectopo(), but no confirmation was reached. So I hope to ask this again:


The pwelch() function in Matlab has a default overlapping of 50%. But Spectopo(), which uses pwelch() function, has the following description in help file:


    'overlap'  = [integer] window overlap in data points {default: 0}

So in the end do we need to pass the overlap value pair to Spectopo()?

Thank you!
Shan Xin



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

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