Figure 5. Frustration for two-node network in (a), both three-node networks in (b), and all six possible four-node networks in (c).

Total frustration F is reported, along with all link frustrations , illustrated by the (color)scale. Frustration is defined in Eq.3 and Eq.4, and refers to the dynamical model Eq.2. Note that three four-node networks are frustrated, and the other three are not.