System Difference plotted against motifs. Each graph is generated by calculating System Difference (SD) and metric in 1,000 random, weakly connected networks (n = 100) sampled uniformly over density. A random density value was generated for each matrix by adding conncetions one at a time until the random density was reached or just exceeded. (A-D) SD plotted against the number of occurences of different motifs of size three. The number convention comes from igraph , so network graphs are displayed for clarity. The plots and network graphs are grouped by the trend observed against SD. (E) SD plotted against the motif number for motifs of size three.