[Eeglablist] Window of integration
Tom Campbell, Ph.D.
tom.campbell at helsinki.fi
Wed Jan 26 04:52:43 PST 2005
Hi,
As something of a newcomer doing rather standard ERP analyses for the time
being, one thing that I am interested in doing is computing the average
amplitude in a window of integration in a given time range (e.g. 62.5-67.5
ms post onset) that is centered on a given group averaged peak (e.g. at 65
ms at Cz).
This sort of thing is/was available in Neuroscan 3.x STATS using AREA ON
and a template. I figure it did something like a high sampled spline fit
in a given the template time range for each electrode, a spot of integral
calculus to calculate the area under this curve and then divided by the
duration of the template range on the time axis. (Please, suggestions for
a book on this would be appreciated).
Please may ask if there are functions to do this method for calculating
amplitudes in a given range in EEGLAB?
Alternatively, please is there a simple way to access the data structures
that store the ERPs used by pop_plotdata()?
Suggestions welcome.
--
Parhain terveisin,
Tom Campbell, Ph.D.
Room 137
Helsinki Collegium for Advanced Studies
University of Helsinki, Finland
P.O.Box 4 (Fabianinkatu 24)
FIN-00014 University of Helsinki
Finland
Phone: +358-9 191 23256
Telefax: +358-9 191 22924
Mobile: +358-4 154 09764 87
E-mail: tom.campbell at helsinki.fi
URL: http://www.mv.helsinki.fi/home/campbell/
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