I keep coming up with empty power maps.
Please describe what you mean with "empty power maps.
Do you mean: empty variables in the files, blank cortex surface when you open the files for display?
By "power maps" do you designate the minimum norm source maps, or the PSD values computed from these source maps?
Please post screen captures illustrating your request.
When I examine the source localized files in Matlab I can see that the Time and ImageGridAmp fields are empty (as if they were never converted to continuous files?)
This is normal for "kernel only":
- https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#Computing_sources_for_single_trials
- https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#On_the_hard_drive
Before reading the tutorial you are referring to, we recommend you start by following all the introduction tutorials (section "Get started") using the example dataset provided:
https://neuroimage.usc.edu/brainstorm/Tutorials
Before following