I want to do Agglomerative Hierarchical clustering using complete linkage method in R using the function agnes or hclust. 
1. Can i do a cluster analysis of h=(n+p+1)/2 out of n observation?  note that p=nomber of variables(dependent and independent)
2. Can i plot the dendrogram and get the cluster history of this analysis in R?
3. Can i use the cluster with the largest values to sort the n observations in ascending order?
Your assistance and guide will be greatly appreciated in solving problems 1-3
Thanks
EKELE ALIH
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