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This type of diagram visualises the inter-relationships between entities. The connections between entities is used to display that they share something in common. This makes Chord Diagrams ideal for comparing the similarities within a dataset or between different groups of data.
Nodes are arranged around a circle, with the relationships between points connected to each other either through the use of arcs or Bézier curves. Values are assigned to each connection, which is represented proportionally by the size of each arc. Colour can be used to group the data into different categories, which aids in making comparisons and distinguishing groups.
Over-cluttering becomes an issue with Chord Diagrams, which happens when there are too many connections displayed.