Sanky diagram with cycle - loops

[paulrougieux]

Links between Sankey nodes are always uni-directional, they flow from left to right but it is not possible to link back to a previous node. For example with three nodes linked in this way: A -> B -> C
It is not possible to loop back from C to A.
Would it be possible to introduce Sankey diagrams with cycle or loops as discussed here:
d3/d3-plugins#1

[cjyetman]

This has been possible since #79 was merged.

library(networkD3)

links <- read.csv(header = TRUE, as.is = TRUE, text = "
source,target,value
0,1,1
1,2,1
2,0,1
")

nodes <- read.csv(header = TRUE, as.is = TRUE, text = "
name
A
B
C
")

sankeyNetwork(Links = links, Nodes = nodes, Source = "source",
              Target = "target", Value = "value", NodeID = "name")

[paulrougieux]

Thank you @cjyetman for the example.