"""
From linkage matrix to dendrogram
=================================
"""

# %%
# The :func:`~pdendro.attach_dendrogram` function generates components of a dendrogram from
# a linkage matrix and attaches them to a figure. Let us assume that we have the following data
# points:

X = [[0.0], [1.0], [3.0], [6.0]]

# %%
# The linkage matrix can be computed using the :func:`scipy.cluster.hierarchy.linkage` function:

import scipy

Z = scipy.cluster.hierarchy.linkage(X)

# %%
# Then, a dendrogram can be drawn as follows:

import plotly.graph_objects as go
import plotly.io as pio

from pdendro import attach_dendrogram

fig = go.Figure()
attach_dendrogram(fig, Z)
pio.show(fig)