![]() Using the blank ternary graph to the right, plot the. A ternary graph is a triangle with each side representing one of the three main components of the whole. This method provides a new perspective for better interpretation of the spatial and temporal evolution of shipping and multi-port systems. A ternary plot, ternary graph, triangle plot, simplex plot, Gibbs triangle or de Finetti diagram is a barycentric plot on three variables which sum to a constant. The ternary diagram also permit to substitute individually for the CR( n), HHI (also including Gini coefficient and Aitchison distance) and SSA as a tool to investigate the concentration, inequality and competition of a multi-port system. A novel ternary diagram method is proposed to include these five methods together and provide a comprehensive and visual tool to conveniently investigate the concentration gradient, inequality and competition of the YRD multi-port system simultaneously. Noting that the concentration ratio (CR( n)), Herfindahl-Hirschman Index (HHI) (also including Gini coefficient and Aitchison distance) and shift-share analysis (SSA) are only allowed to describe the concentration, inequality and competition of a multi-port system respectively. The Yangtze River Delta (YRD) is the most developed area in China attracting global attention.
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