sankey: any way to force the order of nodes?

[daattali]

When creating a sankey network, sometimes it's useful to be able to have the nodes in a specific order, and there doesn't seem to be a good way of knowing what order they'll appear in.

Example:

links <- data.frame(source = c(0, 1, 0, 1), target = c(2, 2, 3, 3), value = c(1, 2, 3, 4))
nodes <- data.frame(name = c("a", "b", "c", "d"))
networkD3::sankeyNetwork(links, nodes, 'source', 'target', 'value', 'name')

(a is above b)

vs

links <- data.frame(source = c(0, 1, 0, 1), target = c(2, 2, 3, 3), value = c(1, 5, 3, 4))
nodes <- data.frame(name = c("a", "b", "c", "d"))
networkD3::sankeyNetwork(links, nodes, 'source', 'target', 'value', 'name')

(the only difference is that the value "2" changed to "5" and now b is above a)

[cjyetman]

If you set iterations = 0 in sankeyNetwork(), you will effectively disable the algorithm which automatically determines the node placement (which is the primary purpose of the sankeyNetwork() function), and the nodes will be placed in the order that they appear in the Nodes dataframe.