How to color groups in networkD3's sankeyNetwork?

Question

My nodes consists of names and groups yet I can\'t seem to implement distinct colors for groups in my sankey diagram. The colors are either all blue with defaults or all bla

Answer 1

library(networkD3)
source <- c(0,1,2,3,4,5)
target <- c(2,2,2,3,1,0)
value <- c(33,44,55,66,77,88)

sankeydata <- data.frame(source,target, value)

names <- c('a', 'b', 'c', 'd', 'e', 'f')
id <- c(0,1,2,3,4,5)
group <- c(1,1,1,2,2,2)

sankeyNodes <- data.frame(names,id, group)


sankeyNetwork(Links = sankeydata, Nodes = sankeyNodes, Source = "source",
         Target = "target", Value = "value", NodeID = "names", NodeGroup = "group", fontSize = 12, nodeWidth = 30)

I would expect two colors ( since there are two groups), but no colors return. I have the same issue as OP.

The help text suggests NodeGroup is responsible for the color.

If you run a similar code for another graph in library(networkD3):

#same data
forceNetwork(Links = sankeydata, Nodes = sankeyNodes , Source = "source",
         Target = "target", Value = "value", NodeID = "names",
         Group = "group", opacity = 0.8, zoom = TRUE)

Plots two different colors for in the network graph.