Figure 8.

Subgraph intensity reveals recurring weighted motifs. A, The mean ratio of the intensity of subgraphs in the real network and the intensities of the same subgraphs in 1000 shuffled networks is shown as a function of subgraph size, for graphs with positive edge weight product (blue, network from Fig. 2A; green, network from Fig. 2C; SD error bars are approximately the size of the dots). The intensity of small subgraphs is greater in the real network than in the random networks. B, Same as A but for subgraphs with negative edge weight product. Unlike the result in A, triangles with negative edge weight product (frustrated triangles) have lower intensity in the real network than in the random networks. C, Absolute value of subgraph intensity as a function of subgraph diameter for triangles.