Figure 9

Schematic representation of the validation/projection procedure described in Sect. 3.3. (a) The validated projection procedure starts from a real bipartite network. The goal is to project the information contained in the system into the layer of turquoise nodes. (b) In order to compare the observations with a proper benchmark, we define the Bipartite Configuration Model (BiCM) ensemble. Such set includes all possible graphs, from the empty to the complete ones; in each realization, the number of nodes per layers is fixed to the value of the real network. (c) For the present example, we consider the couple \((i,j)\) and count the number of common neighbours (the number of V-motifs). We then compare the number of common neighbors in the real network with the one on the ensemble (d): if it is statistically significant with respect to the BiCM, (e) we have a link connecting i and j in the validated monopartite projection network. The figure is an adaptation from [18]