Return two trees after pruning them so that the only leaves left are the intersection of their labels.

intersect_trees(dend1, dend2, warn = dendextend_options("warn"), ...)

Arguments

dend1

tree object (dendrogram/hclust/phylo)

dend2

tree object (dendrogram/hclust/phylo)

warn

logical (default from dendextend_options("warn") is FALSE). Set if warning are to be issued, it is safer to keep this at TRUE, but for keeping the noise down, the default is FALSE. Should a warning be issued if there was a need to perform intersaction.

...

passed on

Value

A dendlist with two pruned trees

Examples

hc <- hclust(dist(USArrests[1:5, ]), "ave")
dend <- as.dendrogram(hc)
labels(dend) <- 1:5
dend1 <- prune(dend, 1)
dend2 <- prune(dend, 5)
intersect_dend <- intersect_trees(dend1, dend2)

layout(matrix(c(1, 1, 2, 3, 4, 5), 3, 2, byrow = TRUE))
plot(dend, main = "Original tree")
plot(dend1, main = "Tree 1:\n original with label 1 pruned")
plot(dend2, main = "Tree 2:\n original with label 2 pruned")
plot(intersect_dend[[1]],
main = "Tree 1 pruned
with the labels that intersected with those of Tree 2"
)
plot(intersect_dend[[2]],
main = "Tree 2 pruned
with the labels that intersected with those of Tree 1"
)