How to shift quartile lines in seaborn grouped violin plots?-CodePudding

Consider the following seaborn grouped violinplot with split violins, where I inserted a small space inbetween.

import matplotlib
import matplotlib.pyplot as plt
import seaborn as sns

sns.set_theme(style="whitegrid")

tips = sns.load_dataset("tips")

fig, ax = plt.subplots()
sns.violinplot(
    data=tips, x="day", y="total_bill", hue="smoker", split=True, inner="quart", linewidth=1,
    palette={"Yes": "b", "No": ".85"}, ax=ax
)
sns.despine(left=True)
delta = 0.025
for ii, item in enumerate(ax.collections):
    if isinstance(item, matplotlib.collections.PolyCollection):
        path, = item.get_paths()
        vertices = path.vertices
        if ii % 2:  # -> to right
            vertices[:, 0]  = delta
        else:  # -> to left
            vertices[:, 0] -= delta
plt.show()

How can I shift the quartile (and median) indicating dotted (and dashed) lines back inside the violins?

CodePudding user response：

You can do it exactly the same way as you did with the violins:

for i, line in enumerate(ax.get_lines()):
    line.get_path().vertices[:, 0]  = delta if i // 3 % 2 else -delta