"agnes"
represent an agglomerative hierarchical clustering of a dataset.
agnes object is a list with the following components:agnes."agnes" class has methods for the following generic functions:
print, summary, plot, and
as.dendrogram. In addition, cutree(x, *) can be used to “cut”
the dendrogram in order to produce cluster assignments.agnes, diana,
as.hclust, hclust,
plot.agnes, twins.object.data(agriculture)
ag.ag <- agnes(agriculture)
class(ag.ag)
pltree(ag.ag) # the dendrogram
## cut the dendrogram -> get cluster assignments:
(ck3 <- cutree(ag.ag, k = 3))
(ch6 <- cutree(as.hclust(ag.ag), h = 6))
stopifnot(identical(unname(ch6), ck3))
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