A Chord diagram is a graphical method of displaying the inter-relationships (flow or connection) between relatable entities in a circular layout. The data are arranged radially, known as nodes, around a circle with the relationships between the data points typically drawn as asymmetric arcs (or links) connecting the data.
A chord diagram helps in showing a relationship between different categories of data. The colored links in the diagram helps identify the dominant categories. Some of the use-cases for the chord diagram would be to display flows or connections for migration of people from country to another, for bilateral trades between countries, for subscribers switching telecom operators, among many others.
The essence of a chord diagram is in knowing the dominant relationships. This will help in toggling to focus on the most important relationships. The format can be aesthetically pleasing, making it a popular choice in the world of data visualization.
Chord with Self-links
Represent the weighted relationships in a radial layout including self linkages.