k=2 , CH= 13.41, well separated cluster k=4 , CH= 269.68 overlapped cluster
The figure is k-mean algorithm with k=2 and CH= 13.41 and the second one is k-mean algorithm with k=4 , and CH = 269.68
i have added the 3rd figure in which the cluster are not separated well and the CH = 729 ??
the K=2 and the first figure is separated well cluster , while the second one is nonseparated well cluster
any suggestion please iam confused with CH behavior.