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<p>Greetings,</p>
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<p>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:</p>
<p><a href="https://sccn.ucsd.edu/pipermail/eeglablist/2011/004188.html" class="OWAAutoLink" id="LPlnk406114" previewremoved="true">https://sccn.ucsd.edu/pipermail/eeglablist/2011/004188.html</a>.</p>
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<p>I have successfully been able to follow a portion of Arno's response ["<i>erspdata may then contain data of size (5 elecs x 12 subjects) for example when plotting scalp topographies.
</i><u style="font-style: italic;">You may then average the first dimension</u>"]; however, I have not been able to successfully " <i>replot the result"</i>. 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.</p>
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<p>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!</p>
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<p>Best Regards,</p>
<p>Julie<br>
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<p>Julie M. Schneider, M.S.</p>
<p>Doctoral Student</p>
<p>The Developmental Neurolinguistics Lab</p>
<p>Brain and Behavioral Sciences, University of Texas at Dallas</p>
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