Chord diagram (information visualization)

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A chord diagram is a simple way to show how items in a data table relate to each other. Items sit around a circle, and connections between them appear as curved arcs inside the circle. The arc thickness indicates how strong the relationship or flow is. Each item can be colored or patterned to stand out. These diagrams are also known as radial network diagrams or circular layouts. When there are many connections, the diagram can get cluttered, so designers use techniques like hierarchical edge bundling to group lines and reduce visual noise. Chord diagrams help compare flows between entities and are used in fields like migration studies, economics, and genomics. They can also reveal hidden relationships to help address filter bubbles.