[Eeglablist] MEG and EOG channels

[Anda Popescu]

Hi Steve,
 
Get the data with a=EEG.data; then multiply the MEG channel data with one factor and the EOG with another:
say EOG is channel 152, then EEG.data(1:151,:)=factorMEG * EEG.data(1:151,:); EEG.data(152,:)=factorEOG * EEG.data(1:152);
Try some factors and see what works. After you get the right factors, resave the dataset to keep the scaling.
 
Anda

 
Anda Popescu, PhD
Senior Research Associate

Hoglund Brain Imaging Center
Mail Stop 1052
3901 Rainbow Boulevard
Kansas City, KS 66160

email: apopescu at kumc.edu
website: http://www.kumc.edu/hoglund/
phone: (913) 945 6276
fax: (913) 588 9071
>>> Stephen Politzer-Ahles <politzerahless at gmail.com> 3/8/2012 3:29 PM >>>
Hello all,

I have imported some data recorded from a CTF system with 151 MEG channels and 2 EOG channels. I am interested in scrolling through the data (either continuous or epoch-by-epoch) to manually reject artifacts. Normally when I do visual artifact rejection I look at the scalp and EOG channels together. For this data, however, the MEG and EOG channels get plotted using the same scale, which makes neither one show up well (see http://imageshack.us/photo/my-images/687/eeglabctfdatascaledfore.png/ and http://imageshack.us/photo/my-images/811/eeglabctfdatascaledform.png/). Does anyone know if it's possible in eegplot() to show the MEG and EOG channels at different scales?

Thank you,
Steve Politzer-Ahles

-- 
Stephen Politzer-Ahles
University of Kansas
Linguistics Department
http://www.linguistics.ku.edu/
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