all_couple_rotations_at_k | R Documentation |

Given a tree and a k number of clusters, the tree is rotated so that the extra clusters added from k-1 to k clusters are flipped.

This is useful for finding good trees for a tanglegram.

```
all_couple_rotations_at_k(dend, k, dend_heights_per_k, ...)
```

`dend` |
a dendrogram object |

`k` |
integer scalar with the number of clusters the tree should be cut into. |

`dend_heights_per_k` |
a named vector that resulted from running heights_per_k.dendrogram. When running the function many times, supplying this object will help improve the running time if using the cutree.dendrogram method.. |

`...` |
not used |

A list with dendrogram objects with all the possible rotations for k clusters (beyond the k-1 clusters!).

tanglegram, match_order_by_labels, entanglement, flip_leaves.

```
## Not run:
dend1 <- USArrests[1:5, ] %>%
dist() %>%
hclust() %>%
as.dendrogram()
dend2 <- all_couple_rotations_at_k(dend1, k = 2)[[2]]
tanglegram(dend1, dend2)
entanglement(dend1, dend2, L = 2) # 0.5
dend2 <- all_couple_rotations_at_k(dend1, k = 3)[[2]]
tanglegram(dend1, dend2)
entanglement(dend1, dend2, L = 2) # 0.4
dend2 <- all_couple_rotations_at_k(dend1, k = 4)[[2]]
tanglegram(dend1, dend2)
entanglement(dend1, dend2, L = 2) # 0.05
## End(Not run)
```

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