Group average We now consider the group average version of hierarchical clustering. In this case, the proximity of two clusters is defined as the average pairwise proximity among all pairs of points in the different clusters This is an intermediate approach between the single and complete link approaches 8/20/2016 PATTERN RECOGNITIONGroup average We now consider the group average version of hierarchical clustering. In this case, the proximity of two clusters is defined as the average pairwise proximity among all pairs of points in the different clusters. This is an intermediate approach between the single and complete link approaches. 8/20/2016 PATTERN RECOGNITION 57