[Eeglablist] spectral analysis of EEG signal

[Arnaud Delorme]

They are in log(uV^2/Hz).
dB assumes a baseline.

Arno

On Oct 16, 2014, at 7:51 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:

> Thanks Arno.
> Are these power in dB unit or uV^2? I would be interested in knowing if there is any option to output uV^2 instead of dB.
> 
> Makoto
> 
> On Thu, Oct 16, 2014 at 3:34 PM, Arnaud Delorme <arno at ucsd.edu> wrote:
> To obtain power at specific frequencies, enter them in the 'freqs' input and select 'plottype', 'curve' to plot the results as a curves against time instead of a time-frequency image. 
> 
> The output  of newtimef always return the power which is being plotted.
> 
> Arno
> 
> 
> On Oct 16, 2014, at 2:39 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:
> 
>> Dear Arno,
>> 
>> I'm also curious to know if there is a supported option to obtain the raw value from newtimef(). I've got a similar inquiry from John Iversen recently and I could not answer it.
>> 
>> Makoto
>> 
>> On Wed, Oct 8, 2014 at 1:02 PM, nishanth reddy <nishanth.reddy56 at gmail.com> wrote:
>> I'm doing Time-frequency analysis of my EEG signal to find out the power of each frequency at particular time by plotting the channel time-frequency maps.
>> 
>> I'm unable to give the length of hamming as 10 seconds and also , i'm not getting the RAW power of frequency at time. 
>> 
>> Is plotting the time frequency analysis right method to find out the power of frequencies ? If not , can anyone send me the Matlab code to perform the FFT(, Pwelch) to find out the power 
>> -- 
>> Thanks&Regards
>> 
>> Nishanth 
>> 
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>> 
>> 
>> -- 
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
> 
> 
> 
> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego

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