Sim_Wang_edge_2012
Sim_Wang_edge_2012(dag, terms, verbose = simona_opt$verbose)It is calculated as:
sim = depth(c)^2/depth_c(a)/depth_c(b)where depth_c(a) is the longest distance between root to a passing through c.
Paper link: doi:10.1186/1477-5956-10-s1-s18 .