Python source code: [download source: grouped_violinplots.py]
import seaborn as sns
sns.set(style="whitegrid", palette="pastel", color_codes=True)
# Load the example tips dataset
tips = sns.load_dataset("tips")
# Draw a nested violinplot and split the violins for easier comparison
sns.violinplot(x="day", y="total_bill", hue="smoker",
split=True, inner="quart",
palette={"Yes": "y", "No": "b"},
data=tips)
sns.despine(left=True)