1. Inter-City Migration Flow
Background
A researcher needs to present migration data between four major cities to show population shifts.
Problem
Traditional bar charts fail to show the bidirectional nature of the movement clearly.
How to use
Input the migration counts between cities as source-target-value pairs and enable labels.
[{"source": "Beijing", "target": "Shanghai", "value": 850}, {"source": "Shanghai", "target": "Beijing", "value": 780}, {"source": "Beijing", "target": "Shenzhen", "value": 480}]Outcome
A clear, circular diagram showing the volume of migration between cities, with thicker chords representing higher population movement.