Chord diagram is a visually appealing way to represent weighted relationships in a radial layout. Entities (or categories) among which the weighted relationship exist are drawn on the circumference whereas the actual weighted relationship are drawn as links in the circular space of the chord diagram. Most of the time this weighted relationship is a flow or a movement like, migration of people from one country to another, or, subscribers switching telecom operators. The essence of a chord diagram is in knowing the dominant relationship and one can toggle to narrow focus on most important relationships.
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