heights_per_k.dendrogram: Which height will result in which k for a dendrogram

In talgalili/dendextend: Extending 'dendrogram' Functionality in R

Which height will result in which k for a dendrogram

Description

Which height will result in which k for a dendrogram. This helps with speeding up the cutree.dendrogram function.

Usage

heights_per_k.dendrogram(dend, ...)

Arguments

dend	a dendrogram.
...	not used.

Value

a vector of heights, with its names being the k clusters that will result for cutting the dendrogram at each height.

Examples

## Not run: 
hc <- hclust(dist(USArrests[1:4, ]), "ave")
dend <- as.dendrogram(hc)
heights_per_k.dendrogram(dend)
##       1        2        3        4
## 86.47086 68.84745 45.98871 28.36531

cutree(hc, h = 68.8) # and indeed we get 2 clusters

unbranch_dend <- unbranch(dend, 2)
plot(unbranch_dend)
heights_per_k.dendrogram(unbranch_dend)
# 1        3        4
# 97.90023 57.41808 16.93594
# we do NOT have a height for k=2 because of the tree's structure.


## End(Not run)

talgalili/dendextend documentation built on Jan. 27, 2024, 7:43 p.m.