R: Retrieve/assign colors to the labels of a dendrogram
labels_colors
R Documentation
Retrieve/assign colors to the labels of a dendrogram
Description
Retrieve/assign colors to the labels of a dendrogram. Note that usually dend objects come without any color assignment (and the output will be NULL, until colors are assigned).
Boolean (default is TRUE), should the returned vector of colors
return with the leaves labels as names.
...
not used
value
a vector of colors to be used as new label's colors for the dendrogram
Value
A vector with the dendrogram's labels colors (or a colored dendrogram,
in case assignment is used). The colors are labeled.
Source
Heavily inspired by the code in the example of dendrapply,
so credit should go to Martin Maechler.
I also implemented some ideas from Gregory Jefferis's dendroextras package
(having the "names" of the returned vector be the labels).
# define dendrogram object to play with:
hc <- hclust(dist(USArrests[1:3,]), "ave")
dend <- as.dendrogram(hc)
# Defaults:
labels_colors(dend)
plot(dend)
# let's add some color:
labels_colors(dend) <- 2:4
labels_colors(dend)
plot(dend)
# doesn't work...
# get_nodes_attr(dend, "nodePar", include_branches = FALSE)
# changing color to black
labels_colors(dend) <- 1
labels_colors(dend)
plot(dend)
# removing color (and the nodePar completely - if it has no other attributed but lab.col)
labels_colors(dend) <- NULL
labels_colors(dend)
plot(dend)