order.dendrogram {stats} | R Documentation |
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 class 'dendrogram'
labels(object, ...)
x , object |
a dendrogram (see |
... |
additional arguments |
The indices or labels for the leaves in left to right order are retrieved.
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).
R. Gentleman (order.dendrogram
and Martin Maechler
(labels.dendrogram
).
reorder
, dendrogram
.
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(labels(d2) == rownames(USArrests)[order.dendrogram(d2)])