Figure 9From: PQR sort: using PQR trees for binary matrix reorganizationODLIS adjacency matrix. (a) Original adjacency matrix with 2,909 × 2,909 terms. Row terms are explained by column terms according to the adjacency. (b-d) The same matrix after being reordered by 2D sort, Sugiyama, and PQR sort. Original images have one pixel per cell; they were resized and sharpened for this paper.Back to article page