How to specify linewidth in Seaborn's clustermap dendrograms

Question

Normally I would increase matplotlib\'s global linewidths by editing the matplotlib.rcParams. This seems to work well directly with SciPy\'s dendrogram implementation but not wi

Answer 1

for newer versions of seaborn (tested with 0.7.1, 0.9.0), the lines are in a LineCollection, rather than by themselves. So their width can be changed as follows:

import seaborn as sns
import matplotlib.pyplot as plt

# load data and make clustermap
df = sns.load_dataset('iris')
g = sns.clustermap(df[['sepal_length', 'sepal_width']])

for a in g.ax_row_dendrogram.collections:
    a.set_linewidth(10)

for a in g.ax_col_dendrogram.collections:
    a.set_linewidth(10)