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ucdavis / erplab

ERPLAB Toolbox is a free, open-source Matlab package for analyzing ERP data. It is tightly integrated with EEGLAB Toolbox, extending EEGLAB’s capabilities to provide robust, industrial-strength tools for ERP processing, visualization, and analysis. A graphical user interface makes it easy for beginners to learn, and Matlab scripting provides enormous power for intermediate and advanced users.
http://erpinfo.org/erplab
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Error in grand-average mean #174

Open Zrn1213 opened 9 months ago

Zrn1213 commented 9 months ago

I added two virtual channels (the averages of certain existing channels) to a series of .set files, which resulted in the corresponding .erp files. However, after averaging this series of .erp files, I noticed that the values of each channel were several tens of times larger than the actual values. Why is this happening? The values were normal after the first conversion step. In fact, I want to compute the SEM for the two virtual channels (the averages of certain existing channels) ,how to get it? I use EEGLAB v2021.0 ERPLAB v8.10

davidg622 commented 9 months ago

Hello,

When you are creating the .erp files, are you only using the two virtual channels? It would help if you could email me a sample of your data so I can see what's going on. Please email me at lucklab.manager@gmail.com

Thanks,

David