Dear Brainstorm experts,
Could you tell me how to combine ROIs for connectivity analysis, please? I calculated source connectivity and got several ROIs including BA4L, BA4R, BA6L, and BA6R. Now I would like to combine BA4L and BA6L into one ROI, and BA4R as well as BA6R into another ROI. How can I reduce the 4* 4 matrices into 2* 2 ones?