Chord Diagram with Bokeh


A chord chart is used for representing the relationships between data points. Each data points are arranged into a circle and their relationships are displayed with chords. This post describes how to draw a chord chart using bokeh library of pyhton.

You can use Chord element of holoviews library to produce chord diagrams. It uses bokeh and matplotlib libraries as backends. The following example is taken from the official documentation where you can find more information about the chord element.

# libraries
import pandas as pd
import holoviews as hv
from holoviews import opts, dim
from bokeh.sampledata.les_mis import data

# data set
nodes = hv.Dataset(pd.DataFrame(data['nodes']), 'index')

# chord diagram
chord = hv.Chord((links, nodes)).select(value=(5, None))
chord.opts(
    opts.Chord(cmap='Category20', edge_cmap='Category20', edge_color=dim('source').str(), 
               labels='name', node_color=dim('index').str()))

Chord Diagram

Network

Sankey

Arc Diagram

Edge Bundling

Contact & Edit

👋 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.

This page is just a jupyter notebook, you can edit it here. Please help me making this website better 🙏!

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