Hi Andrew,
So given Bob's point, you would need to rip those sub-bricks
into separate datasets. For example:
----------
set linfile = Linear*.nii
set logfile = Log*.nii
mkdir ttest
cd ttest
foreach index ( `count -digits 4 0 1000` )
3dbucket -prefix ./Linear_$index.nii ../$linfile"[$index]"
3dbucket -prefix ./Log_$index.nii ../$logfile"[$index]"
end
----------
Then re-run your 3dttest command.
- rick