Scatterplot


A scatter plot displays the relationship between 2 numeric variables. Each data point is represented as a circle. Several tools allow to build one in python, this section provides code samples for Seaborn, Matplotlib and Plotly for interactive versions.

⏱ Quick start

The regplot() function of the Seaborn library is definitely the best way to build a scatterplot in minutes. 🔥

Simply pass a numeric column of a data frame to both the x and y variable and the function will handle the rest.

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

# use the function regplot to make a scatterplot
sns.regplot(x=df["sepal_length"], y=df["sepal_width"])

⚠️ Scatterplot and overplotting

The main danger with scatterplots is overplotting. When the sample size gets big, circles tend to overlap, making the figure unreadable.

Several workarounds exist to fix the issue, like using opacity or switching to another chart type:

Seaborn logoScatterplots with Seaborn

Seaborn is a python library allowing to make better charts easily. The boxplot function should get you started in minutes. The examples below aim at showcasing the various possibilities this function offers.

If you are interested in scatterplots, some other chart could be useful to you.

A scatterplot with marginal distribution allows to check the distribution of both the x and y variables. A correlogram allows to check the relationship between each pair of numeric variables in a dataset.

🔎 violin function parameters→ see full doc

stringcolor under the curve


Matplotlib logoScatterplots with Matplotlib

Matplotlib is another great alternative to build scatterplots with python. As often, it takes a bit more lines of code to get a decent chart, but allows more customization.

Contact

👋 This document is a work by Yan Holtz. Any feedback is highly encouraged. You can fill an issue on Github, drop me a message onTwitter, or send an email pasting yan.holtz.data with gmail.com.

Violin

Density

Histogram

Boxplot

Ridgeline

Scatterplot

Heatmap

Correlogram

Bubble

Connected Scatter

2D Density

Barplot

Spider / Radar

Wordcloud

Parallel

Lollipop

Circular Barplot

Treemap

Venn Diagram

Donut

Pie Chart

Dendrogram

Circular Packing

Line chart

Area chart

Stacked Area

Streamgraph

Map

Choropleth

Hexbin

Cartogram

Connection

Bubble

Chord Diagram

Network

Sankey

Arc Diagram

Edge Bundling

Colors

Interactivity

Animation with python

Animation

Cheat sheets

Caveats

3D