[Eeglablist] Induced power from wavelet

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Tue Jan 24 18:00:36 PST 2017

Dear Nancy,

I don't quite understand the question, but I guess that you want to know
how you deal with ERSP most straightforwardly? I think you use newtimef()
function, and visualize the first output as

imagesc(output); axis xy

The basic figure is this. Then you change xaxis labels, yaxis labels, etc.
Do not forget to use eegh(); you perform an operation from GUI first, then
type eegh() to obtain the code executed.


On Sun, Jan 22, 2017 at 3:01 PM, Lundin, Nancy B. <nlundin at indiana.edu>

> ​Hello list,
> I would like to calculate the induced ERSP in my data. I planned to run
> the wavelet decomposition on my data to calculate total power, and then
> separately run a wavelet over the averaged data to get the evoked activity,
> and then subtract the evoked from the total to get induced activity.
> However, when I manually average the trials, I get an error message when
> attempting to save my EEG datasets saying that the number of epochs in the
> data structure is not the same as the number of epochs in the data (which
> makes sense, since I averaged).
> I was wondering if there was a more direct way to calculate induced ERSP
> in EEGLAB rather than this manual subtraction method?
> Thank you,
> Nancy
> *Nancy Lundin*
> *Doctoral Student, Clinical Psychology & Neuroscience*
> Indiana University Bloomington
> Department of Psychological & Brain Sciences
> 1101 East 10th St.
> Bloomington, IN 47405
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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