Theses functions return the order (index) or the "label"
attribute for the leaves in a
dendrogram. These indices can then be used to access the appropriate
components of any additional data.
order.dendrogram(x)# S3 method for dendrogram
labels(object, …)
a dendrogram (see as.dendrogram
).
additional arguments
A vector with length equal to the number of leaves in the dendrogram
is returned. From r <- order.dendrogram()
, each element is the
index into the original data (from which the dendrogram was computed).
The indices or labels for the leaves in left to right order are retrieved.
# NOT RUN {
set.seed(123)
x <- rnorm(10)
hc <- hclust(dist(x))
hc$order
dd <- as.dendrogram(hc)
order.dendrogram(dd) ## the same :
stopifnot(hc$order == order.dendrogram(dd))
d2 <- as.dendrogram(hclust(dist(USArrests)))
labels(d2) ## in this case the same as
stopifnot(identical(labels(d2),
rownames(USArrests)[order.dendrogram(d2)]))
# }
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