order.dendrogram | 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(identical(labels(d2), rownames(USArrests)[order.dendrogram(d2)]))
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