[Eeglablist] time-frequency values

Lluís Fuentemilla llfuente at psi.ub.es
Fri May 21 02:12:31 PDT 2004


  Does anyone know if it's possible to extract the power (dB) values that are 
> produced by a channel time-frequency transform?  I'm trying to get the 
> actual value at each pixel that is mapped in the ERSP image, but I've had 
> no luck getting at the variables that represent this image.  Or is there a 
> better way to find the average power for a specified frequency band and epoch?
> Thanks in advance,
> Jeff


 Hello Jeff,

    The time/frequency image plots that you get from EEGLAB toolbox use timef function under matlab. If you use phasecoher function you will be able to extract power and phase-coherency values for a specific frequency and channel.   

    Lluís.   
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