Sankey series
A Sankey series connects nodes with flows whose widths represent quantities.
When to use
Use it to show how quantities split and merge between stages, such as traffic journeys or energy transfers. Use funnel for a single sequence without branches.
Example
Data
Set type: 'sankey'. Each node has a unique name and a links array. A link contains the target node’s name and a positive value; include target nodes in the same data array, with links: [] for terminal nodes. Supply one Sankey series and avoid cycles.
Series options
Nodes are arranged into columns from source to destination. Include intermediate nodes when a flow passes through several stages. Keep incoming and outgoing quantities consistent at intermediate stages when representing a conserved total.
Colors
Nodes use the chart palette by name. Set color on a node to override it; outgoing links use the source node color. See Colors.