Figure 2.

Pairs of connectivity scores, $y_{(i)}^a$ and $y_{(j)}^a\text{,}$ in common target voxels between two tractograms on the left hand side serve as coordinates of the frequency table given on the right hand side. Elements of the frequency table are incremented for each occurrence of a combination of connectivity scores $(y_{(i)}^a,y_{(j)}^a)$