Figure 2. Parenclitic network reconstruction of a synthetic data set.

The left graph depicts the lineal fit of features 1 and 5; black squares represent instances 1–9, while the red dot represents instance 10 (the one with abnormal expression levels). The central (right) network is the result of the parenclitic reconstruction process for instance number 5 (10), i.e. for a normal (abnormal) instance. Nodes and links are coloured respectively according to their α-centrality and weight, from green (low) to red (high). For the sake of clarity, only links with weight greater than 1.5, and nodes connected to the giant component of the network are represented.