`R/cutree.dendrogram.R`

`heights_per_k.dendrogram.Rd`

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

`heights_per_k.dendrogram(dend, ...)`

- dend
a dendrogram.

- ...
not used.

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

```
if (FALSE) {
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.
}
```