[Eeglablist] Is power calculated in STUDY and in dataset is abs or relative?

[M Abul Hassan]

Dear Tarik
 
I am not interested for ERSP. I would like to calculate mean power in different frequency bands, the results would be different for absolute and relative powers.
 
Thanks
Best Regards
Muhammad Abul Hasan 

--- On Mon, 10/8/12, Tarik S Bel-Bahar <tarikbelbahar at gmail.com> wrote:


From: Tarik S Bel-Bahar <tarikbelbahar at gmail.com>
Subject: Re: [Eeglablist] Is power calculated in STUDY and in dataset is abs or relative?
To: "M Abul Hassan" <abulhassan85 at yahoo.com>
Cc: eeglablist at sccn.ucsd.edu
Date: Monday, October 8, 2012, 4:41 PM


Greetings Abdul,


I am not an expert on the mechanics here,
but I believe if you are referring to ERSP computation using the newtimef function,
then the baseline of values before the 0 time point in your epochs is automatically subtracted.
Please also see  multiple messages on this topic in recent months in the eeglablist archives.


Respectfully,
Tarik








On Fri, Oct 5, 2012 at 2:37 AM, M Abul Hassan <abulhassan85 at yahoo.com> wrote:






Dear all
 
I want to know the power spectrum generated by EEGLAB both in a STUDY and in each dataset seperately is using absolute values or relative values.
 
If it based on relative values than how a frequency range can be known?
 
If it is based on absolute values than how can I calculate the relative power in EEGLAB?
 
Thanks
Best Regards
Muhammad Abul Hasan
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