rect.hclust {stats} | R Documentation |
Draws rectangles around the branches of a dendrogram highlighting the corresponding clusters. First the dendrogram is cut at a certain level, then a rectangle is drawn around selected branches.
rect.hclust(tree, k = NULL, which = NULL, x = NULL, h = NULL, border = 2, cluster = NULL)
tree |
an object of the type produced by hclust . |
k, h |
Scalar. Cut the dendrogram such that either exactly
k clusters are produced or by cutting at height h . |
which, x |
A vector selecting the clusters around which a
rectangle should be drawn. which seleccts clusters by number
(from left to right in the tree), x selects clusters
containing the respective horizontal coordinates. Default is
which = 1:k . |
border |
Vector with border colors for the rectangles. |
cluster |
Optional vector with cluster memberships as returned by
cutree(hclust.obj, k = k) , can be specified for efficiency if
already computed. |
(Invisibly) returns a list where each element contains a vector of data points contained in the respective cluster.
hca <- hclust(dist(USArrests)) plot(hca) rect.hclust(hca, k=3, border="red") x <- rect.hclust(hca, h=50, which=c(2,7), border=3:4) x