Connectivity Matrix Seriation via Relaxation
Fig 6
Application of the smooth-index algorithm to the single-column connectome of the Drosophila optic lobe.
A Connectivity matrix with synaptic weights, ordered according to the sequence of neuropils, from retina to lamina to medulla. B Total number of connections as a function of threshold (‘thrld’) for all connections (in black) as well as for excitatory (in blue) and inhibitory (in red) connections, separately. C Resulting 0,1-adjacency matrix. D Reordered 0,1-adjacency matrix according to the least number of upper triangle entries obtained in 1000 runs of the smooth-index algorithm. E Same as D, but shown with the weights of the original weighted matrix.