[Eeglablist] Question about time-frequency analysis

Iman M.Rezazadeh irezazadeh at ucdavis.edu
Thu Apr 17 21:38:55 PDT 2014

I think if we consider the output of pop_spectopo as pow_value then we can get the absolute vale as abs_value=10.^(pow_value/10); Arno- Please correct me if I have missed anything here!



From: eeglablist-bounces at sccn.ucsd.edu [mailto:eeglablist-bounces at sccn.ucsd.edu] On Behalf Of Makoto Miyakoshi
Sent: Thursday, April 17, 2014 9:32 PM
To: 姜召彩; Derrick; Arnaud Delorme
Subject: Re: [Eeglablist] Question about time-frequency analysis


Dear Derrick and Arno,


Could you check this please?




2014-04-15 23:47 GMT-07:00 姜召彩 <jiangzc at psych.ac.cn <mailto:jiangzc at psych.ac.cn> >:


I'm trying to use the EEGLAB time-frequency analysis. I'd like to look at 'absolute power', not 'dB'.  EEG provides an
optional input called 'outputformat' which can be set to provide 'old 'output in 'absolute amplitude'.  
However, my problem is that when I enter the code 'outputformat', 'old', it gives me an error:
??? Error using ==> mpower
Matrix must be square.
I do not know why. 
Thank you very much for your help!
Best regards,
Zhaocai Jiang
Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China

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

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