[Eeglablist] Plotting ERSP with Merged Channels

[Schneider, Julie]

Greetings,


Using the EEGlab toolbox, I have created a study and can plot the ERSP for an individual electrode, but cannot plot the average of multiple channels. Specifically, I would like to investigate significant differences between my two conditions of interest when FC1,FC2, and C2 are merged together. In attempting to solve this problem, I found a previous inquiry on the eeglab listserv:

https://sccn.ucsd.edu/pipermail/eeglablist/2011/004188.html.


I have successfully been able to follow a portion of Arno's response ["erspdata may then contain data of size (5 elecs x 12 subjects) for example when plotting scalp topographies. You may then average the first dimension"]; however, I have not been able to successfully " replot the result". The clear issue being that the new variable created by averaging this dimension [which is actually the third dimension in my data, and is executed using M=mean(my cell array, 3)] can not be plotted using std_erspplot because it is not a variable within the study. Other methods of plotting, such as image, imagesec, ft_plot_topo, and various attempts through the Fieldtrip toolbox, have proven unsuccessful.


Any additional information on how I may plot these merged channel files would be greatly appreciated. Further, the eeglablist question to which I am referencing was posted circa 2011, and I would imagine there may be newer methods/plug-ins that allow for this analysis to be conducted. Any recommendations that follow another methodology are welcomed and appreciated!


Best Regards,

Julie


Julie M. Schneider, M.S.

Doctoral Student

The Developmental Neurolinguistics Lab

Brain and Behavioral Sciences, University of Texas at Dallas

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20161027/988074b7/attachment.html>