Thanks for the help guys. I'm having problems with the nifti_tool solutions. Before I dive in too deeply, I'm just wondering - do you think there are any decent options for my original workarounds suggested in my post? It seems a lot easier. When I write out the datasets from matlab, they are in afni format, and I could certainly skip or postpone the conversion to nifti.
I'd like to know if there's any decent utiltity for converting abuc to 3d+time entirely within afni, or failing that, "splitting" up an abuc dataset into individual 3d files. Any ideas?
Thanks,
Jed