Hello Afni experts,
I have 2 questions regarding how 3dQwarp works.

The first pertains to the -weight option where we can supply our own weights. What are the units that is expected for weights? Is this a 3d volume with mm shift for each direction with +/- for direction or is this an arbitrary weighting normalized to a scale between 0 and 1 or something else?


The second question is regarding the -iniwarp option. Similar to the first question, what is the format of the input? Is this file with 3 sub-volume file, one for x,y,z? Are the units mm shift for each voxel where +/- values are used to indicate direction of shift?

For both of these, is the input expected in a certain orientation (ie RPI) or does it just have to match the input or base volume?

Thanks,
Ajay