[Eeglablist] Question about time-frequency analysis

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Thu Apr 17 21:59:23 PDT 2014


Dear Iman,

The equation is right, and you may want use an option not to subtract
baseline if you need absolute values.

Makoto


2014-04-17 21:38 GMT-07:00 Iman M.Rezazadeh <irezazadeh at ucdavis.edu>:

> 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
> *Cc:* EEGLAB List
> *Subject:* Re: [Eeglablist] Question about time-frequency analysis
>
>
>
> Dear Derrick and Arno,
>
>
>
> Could you check this please?
>
>
>
> Makoto
>
>
>
> 2014-04-15 23:47 GMT-07:00 姜召彩 <jiangzc at psych.ac.cn>:
>
>
>
> Hi,
>
>
>
> 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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>
>
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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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