Figure 4

Schematic illustration of Minimum Spanning Trees (along the lines of Stam et al.83). Different configurations consisting of N = 9 nodes and N = 8 edges. (A) Tree with shortest possible diameter and maximum number of leaves. (B) Tree with longest possible diameter and lowest number of leaves. (C) Mixed tree forms with a diameter of 4 (top) and 6 (bottom) and a leaf number of 4 in both cases. For our analyses, diameter and leaf fraction were standardized by the total number of edges and maximum possible leaf fraction, respectively.