4) Average the datasets using AFNI 3dMean
3dMean -prefix <pname> <datasets É>

 Class Example:  (from within lc_play/ directory)

3dMean  -prefix mprage_avg  \
               mprage*_n3vr+orig.BRIK   mprage1_n3+orig
Volume
preprocessing
Segmentation
Tessellation
Inflation
Manual Editing
Re-inflation
Fix topology
Final Surface
Volume/Surface
postprocessing
Cutting &
Flattening