I dont know if this is because of an update, but shortly ago when I run the following code, I would get one plot averaged over Oz, O1 and O2, and not three plots. How can I get my averaged plot back?
The plot method of an AverageTFR object has a combine argument which controls how channels are combined. By default, you get one plot for each channel. You need to set combine="mean" to get an average.