Hi John,

Perhaps others are in the same boat as I am... I simply do not
understand what you are trying to compute. Are you talking about
computing the overlap of some particular ROI across each subject,
either an anatomical or a statistical ROI?

It isn't clear from what you are extracting coordinates, how the
coordinates are compared, or why. Would these possibly be ROI
centers of mass? Maybe statistical peaks?

When you say "take the average of all func data", what is the
"func data" that you refer to? Is it EPI, or maybe beta weights?
Your second step is to extract into a single dataset. Again, I
do not understand.

If you show and describe the actual commands, maybe it will be
more clear.

Thanks,

- rick