Hi Alex

easiest way is to give a value to the voxels in each mask (like 1,2 and so on) after binarizing. In this way when you multiply or divide the remaining voxels will have a different value based on the values in each mask. You can also look at the example in the man page of afni 3dcalc as well.

Best

Francesco Sammartino MD

On Oct 12, 2017 1:45 PM, "Alexandre Boutet" <[log in to unmask]> wrote:

Dear everyone,

I am trying to confirm how to do a simple command with FSL. What is the appropriate command for an "average map". For example, if I have 3 labels with a value of 1, and a voxel is only "touched" by 1 of the 3 labels, I want its value to be 0.33.

I was looking in fslmaths but I could not find a good answer there. Is there another command?

Thank you!