[Eeglablist] Creating a percent difference set

[Makoto Miyakoshi]

Dear Nick,

If you are asking Matlab figure plot code,
figure; plot(X)
where X is 1-D data.

If you want to split the frequencies, you can use our filter function
eegfiltnew() which is available from GUI. Bandpass-filter the EEG to
extract freq of interest. If you need power, probably EEG.data.^2 and if
you need amp sqrt(EEG.data.^2) probably these are what you want... I'm
still guessing. If you need integrated values use sum() and for
visualization bar().

Makoto



On Thu, Oct 9, 2014 at 2:19 PM, Nick Wan <nickwan at aggiemail.usu.edu> wrote:

> Hi Makoto,
>
> Yes, I'm running a frequency power analysis. I am just not sure how to
> visualize it in EEGLAB.
>
> For reference, I'm looking for a percent change equation, visualized:
> (X - B) / B
> Where X is a dataset that contains all the responses I would like averaged
> together and B is the dataset that contains all the resting state baseline
> I would like to use to contrast against.
>
> Split into different frequency bands would be ideal.
>
>
> On Tue, Oct 7, 2014 at 2:37 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> wrote:
>
>> Dear Nick,
>>
>> What do you mean by 'activation'? Frequency power?
>> In any way, it looks you have to do some command line calculation by
>> youself. Otherwise, maybe you want to check out this toolbox
>> http://www.poil.dk/s/#.VDRGNZTWXNU
>>
>> Makoto
>>
>>
>>
>> On Sun, Oct 5, 2014 at 8:53 PM, Nick Wan <nickwan at aggiemail.usu.edu>
>> wrote:
>>
>>> Hi all,
>>>
>>> I have a ~300s of resting state I would like to use as baseline,
>>> specifically for a percent change equation:
>>>
>>> (X - B)/B
>>>
>>> Where X = the mean activation of an experimental task and B is mean
>>> activation of baseline (in this case, resting state).
>>>
>>> I tried concatenating the rest and an expt task and using the epoch and
>>> remove baseline functions but that didn't work.
>>>
>>> Any ideas?
>>>
>>> --
>>> Nick Wan
>>> Graduate Student
>>>
>>> Utah State University Psychology Department
>>> 2810 Old Main Hill
>>> Logan, UT 84322
>>>
>>> Office: HSRC 004
>>> Phone: 435-554-8788
>>> Blog: truebra.in
>>>
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>>
>>
>>
>> --
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
>>
>
>
>
> --
> Nick Wan
> Graduate Student
>
> Utah State University Psychology Department
> 2810 Old Main Hill
> Logan, UT 84322
>
> Office: HSRC 004
> Phone: 435-554-8788
> Blog: truebra.in
>



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