GroupSim_SimCHO
GroupSim_SimCHO(dag, group1, group2, verbose = simona_opt$verbose)It is based on the annotated items. Denote sigma(t) as the total annotated items of t. The similarity is calculated as
group_sim = log(C/sigma_max)/log(sigma_min/sigma_max)where C is min(sigma_{x in intersect(A, B)}(x)), i.e., the minimal sigma in the intersection of group1 and group2. Note
Now A and B are just two sets of terms in group1 and group2.
sigma_max is the total number of items annotated to the DAG, sig_min is the minimal number of items annotated to a term, which
is mostly 1.