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Dear FSL experts,

As for grand mean scaling, I find that there is a difference between using fslmaths -ing option and manual computation. For example: (1) fslmaths func -ing 10000 func_norm
               (2) Mean=$(fslstats func -m); fslmaths func -mul 10000 -div $Mean func_norm
The above two methods would get unequal results and the latter one could scale grand mean to 10000. I wonder how the -ing option is implemented and why?

Best,
Yang Hu