Sankey Diagram highchart Issue - highcharts

Question

I want to generate a Sankey Diagram like below , as of now I am using data for series like this:
keys: ['from', 'to' ,'weight'],
data: [
['Entrance A', 'Platform 1' , 10 ],
['Entrance A', 'Platform 2' , 2 ],
['Entrance B', 'Platform 2' , 3 ],
['Entrance C', 'Platform 3' , 5 ],
['Entrance D', 'Platform 4' , 7 ],
['Entrance E', 'Platform 1' , 6 ],
['Entrance F', 'Platform 2' , 10 ],
['Entrance F', 'Platform 4' , 4 ],
['Entrance G', 'Platform 1' , 13 ],
['Platform 1', 'Exit F' , 9 ],
['Platform 2', 'Exit D' , 10 ],
['Platform 2', 'Exit F' , 4 ],
['Platform 3', 'Exit G' , 5 ],
['Platform 3', 'Exit B' , 11 ],
['Platform 4', 'Exit C' , 5 ],
['Platform 4', 'Exit E' , 6]
]
but this generate three node diagram
What kind of data should I use to get similar kind of graph as given in image 1

Answer 1

For the platforms, you can create two types of node : 'Platform X from' and 'Platform X to'. Then, you can use the nodes section to re-define them so both have the same name and same color :
series: [{
type: 'sankey',
keys: ['from', 'to' ,'weight'],
data: [
['Entrance A', 'Platform 1 to' , 10 ],
['Entrance A', 'Platform 2 to' , 2 ],
['Entrance B', 'Platform 2 to' , 3 ],
['Entrance C', 'Platform 3 to' , 5 ],
['Entrance D', 'Platform 4 to' , 7 ],
['Entrance E', 'Platform 1 to' , 6 ],
['Entrance F', 'Platform 2 to' , 10 ],
['Entrance F', 'Platform 4 to' , 4 ],
['Entrance G', 'Platform 1 to' , 13 ],
['Platform 1 from', 'Exit F' , 9 ],
['Platform 2 from', 'Exit D' , 10 ],
['Platform 2 from', 'Exit F' , 4 ],
['Platform 3 from', 'Exit G' , 5 ],
['Platform 3 from', 'Exit B' , 11 ],
['Platform 4 from', 'Exit C' , 5 ],
['Platform 4 from', 'Exit E' , 6]
],
nodes: [
{id: 'Platform 1 from', 'name': 'Platform 1', colorIndex: 0},
{id: 'Platform 1 to', 'name': 'Platform 1', colorIndex: 0},
{id: 'Platform 2 from', 'name': 'Platform 2', colorIndex: 1},
{id: 'Platform 2 to', 'name': 'Platform 2', colorIndex: 1},
{id: 'Platform 3 from', 'name': 'Platform 3', colorIndex: 2},
{id: 'Platform 3 to', 'name': 'Platform 3', colorIndex: 2},
{id: 'Platform 4 from', 'name': 'Platform 4', colorIndex: 3},
{id: 'Platform 4 to', 'name': 'Platform 4', colorIndex: 3},
]
}]