Fig. 4: A schematic diagram for explaining the calculation of Support and Confidence for edge (vi, vj).
From: VeChat: correcting errors in long reads using variation graphs

w(vi, vj) is the approximation for the expected amount of reads that cover edge (vi, vj). S(vi) and P(vj) denote the vertices that succeed vi and precede vj, respectively. In this directed graph, \({v}_{j},{v}_{k^{\prime} }\) are the successors of vi, whereas vi, vk are the predecessors of vi.