Violin plot

A violint plot allows you to visualize the distribution of a numeric variable for one or several groups. Seaborn is particularly adapted to build it thanks to its violin() function. Violin plots deserve more attention than boxplots, which can sometimes hide features of the data.

⏱ Quick start

Seaborn is definitely the best library to quickly build a violin plot. It offers a dedicated violinplot() function that roughly works as follows:🔥

The most basic violin plot one can make with python and seaborn

The most basic violin plot one can make with python and seaborn

# library & dataset
import seaborn as sns
df = sns.load_dataset('iris')

# plot
sns.violinplot(x=df["species"], y=df["sepal_length"])

Seaborn logoViolin charts with Seaborn

Seaborn is a python library that enables you to make better visualizations. It is well adapted to build density charts thanks to its violin function. The following charts will guide you through its usage, going from a very basic violin plot to something much more customized.

How to build a very basic violin. Shows example based on different input formats.

How to build a very basic violin. Shows example based on different input formats.

Make your violin chart horizontal to make labels more readable

Make your violin chart horizontal to make labels more readable

Chart appearance: control violin width, stroke width and more

Chart appearance: control violin width, stroke width and more

How to manage colors on a python violin plot

How to manage colors on a python violin plot

Control the groups order, very useful if you want to display them by increasing mean

Control the groups order, very useful if you want to display them by increasing mean

If you have both groups and subgroups, you'll be interested in a grouped violin plot

If you have both groups and subgroups, you'll be interested in a grouped violin plot

Show the number of observations per group

Show the number of observations per group

If you have both groups and subgroups, you'll be interested in a grouped violin plot

If you have both groups and subgroups, you'll be interested in a grouped violin plot

Add a swarmplot on top of a violin chart to show individual data points

Add a swarmplot on top of a violin chart to show individual data points

🔎 violin function parameters→ see full doc

string→ color under the curve


Matplotlib logoBest python violin chart examples

The web is full of astonishing charts made by awesome bloggers, (often using R). The Python graph gallery tries to display (or translate from R) some of the best creations and explain how their source code works. If you want to display your work here, please drop me a word or even better, submit a Pull Request!

A combination of a violin plot and a boxplot. Allows the comparison of several groups with statistical test results on top.

A combination of a violin plot and a boxplot. Allows the comparison of several groups with statistical test results on top.

Contact


👋 This document is a work by Yan Holtz. You can contribute on github, send me a feedback on twitter or subscribe to the newsletter to know when new examples are published! 🔥


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