r - How to sort source and/or target nodes in a sankey diagram within a shiny app? -


i have simple sankey diagram, generated using networkd3 package inside shiny app. how can source and/or target nodes sorted?

as can see in mwe, default, neither source nodes (a, b, c, d, e) nor target nodes (v, w, x, y, z) sorted. @ least, sorting not comprehensible me.

sankeydiagram

code:

library("shiny") library("networkd3")  ui <- fluidpage(   column(3),   column(6, sankeynetworkoutput("mysankeyd")),   column(3) )  server <- function(input, output) {   output$mysankeyd <- rendersankeynetwork({     mydf <- list(       nodes=data.frame(name=c( "a", "b", "c", "d", "e",                                "v", "w", "x", "y", "z")),       links=data.frame(source=as.integer(c(0, 1, 2, 3, 3, 4, 4)),                        target=as.integer(c(7, 6, 7, 8, 7, 5, 9)),                        value =           c(1, 4, 1, 5, 1, 5, 3)       )     )      sankeynetwork(links = mydf$links, nodes = mydf$nodes, source = "source",                   target = "target", value = "value", nodeid = "name",                   units = "twh", fontsize = 25, nodewidth = 30, fontfamily = "sans-serif", iterations = 30)   }) }  shinyapp(ui, server)

how sankeynetwork() determine order of nodes? possible sort them alphabetically?

i'd have sorted source nodes, if possible sorted target nodes.

edit @emilliman5 pointed out in comment, no possible sort nodes manually.

thus, there other r packages out there generate sankey diagrams allow sorting of nodes? if yes, how so?

setting iterations = 0 inside sankeynetwork() did trick. nodes plotted same order in nodes dataframe.

library("networkd3")  mydf <- list(     nodes=data.frame(name=c( "a", "b", "c", "d", "e",                              "v", "w", "x", "y", "z")),     links=data.frame(source=as.integer(c(0, 1, 2, 3, 3, 4, 4)),                      target=as.integer(c(7, 6, 7, 8, 7, 5, 9)),                      value =           c(1, 4, 1, 5, 1, 5, 3)     ) )  sankeynetwork(links = mydf$links, nodes = mydf$nodes, source = "source",               target = "target", value = "value", nodeid = "name",               units = "twh", fontsize = 25, nodewidth = 30,                fontfamily = "sans-serif", iterations = 0)

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