Group average We observe that d(3, 6, 41, 2, 5]) is smaller than d(3, 6, 4, 13) andd({2.5}{1}) As a result, 3, 6, 4 and (2, 5 are merged at the fourth stage 8/20/2016 PATTERN RECOGNITIONGroup average We observe that d({3,6,4},{2,5}) is smaller than d({3,6,4},{1}) and d({2,5},{1}). As a result, {3,6,4} and {2,5} are merged at the fourth stage. 8/20/2016 PATTERN RECOGNITION 61