single_linkage_tree_

property PLSCAN.single_linkage_tree_: ndarray[tuple[int, int], dtype[float64]]

The full single-linkage dendrogram in scipy linkage format.

A float64 array of shape (n_samples - 1, 4) (or fewer rows when the input contains multiple connected components). Columns are:

• 0 — parent node index

• 1 — child node index (leaf indices are in [0, n_samples))

• 2 — merge distance (mutual reachability distance)

• 3 — size of the child subtree

This format is compatible with scipy.cluster.hierarchy.dendrogram() and related scipy functions.