構造同値性にもとづく階層クラスタ分析にはequiv.clust関数を使う。例.> dat <- matrix(c(+ 0,1,1,0,0,0,0,0,0,0,+ 1,0,1,1,0,0,0,0,0,0,+ 1,1,0,1,0,0,0,0,0,0,+ 0,1,1,0,1,1,1,0,0,0,+ 0,0,0,1,0,0,1,0,0,0,+ 0,0,0,1,0,0,0,0,0,0,+ 0,0,0,1,1,0,0,1,0,0,+…