Compute average size of 2 regions in a matrix
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I would like to normalze a structural connectivity matrix (360 x 360) containing the number of streamlines between any two regions by the (average/sum) size of the respective two regions.
I do have information about the size of each brain regions (360) but what I would like to do is average the size of two regions and save that number in a Matrix (360 x 360) so that each node contains information about the average size of the two regions.
Any help would be appreciated, thanks!!