Preserve custom node placement of a sankeyNetwork (networkD3) in R

Question

I wish to customise the horizontal and vertical position of nodes in a sankeyNetwork (networkD3) in R, and export the network as a high-resolution image.

I credit and use the reproducible example of CJ Yetman (enable horizontal movement of nodes in networkD3's sankeyNetwork plots) which allows the user to move the nodes in any horizontal and vertical position:

library(networkD3)
library(htmlwidgets)

ID <- 0:24
NodeGroup <- c(rep(1,8),2,5,rep(4,7),3,5,6,6,7,7,8,9)
name <- c("29581k","5279k","4218k","1917k","1356k","Ventas diversas: 116",
          "Venta diversa: 97","Venta de: 141","Venta totales: 42705",
          "Contribucion marginal: 18183", "17531k","1744k","1326k","1208k",
          "526k","459k","14k","IIBB: 1714","Costo: 22808",
          "Gastos directos: 6734", "Gastos distribudos: 2958","Resultado: 8851",
          "Total Gastos: 9332","Imp. Gcias: 3098","Resultado Netto: 5.753")      

nodes <- data.frame(ID, name, NodeGroup)
nodes$NodeGroup <- as.character(nodes$NodeGroup)
source <- c(0:7, rep(8,9), 10:16, rep(9,3), 19, 20, 21, 21)
target <- c(rep(8,8), 17, 10:16, 9, rep(18,7), 19:21, rep(22, 2), 23, 24)
value <- c(29581,5279,4218,1917,1356,116,97,141,1714,17531,1744,1326,1208,526,
           459,14,18138,17531,1744,1326,1208,526,459,14,6374,2958,8851,6374,
           2958,3098,5753)
group <- c(1:8, rep(9,8), 10, rep(19,7), rep(18,3), rep(23,2), rep(22,2))
links <- data.frame(source, target, value, group)
links$group <- as.character(links$group)
sn <- sankeyNetwork(Links=links, Nodes=nodes, Source='source', Target='target',
                    Value='value', NodeID='name', fontSize=18, 
                    NodeGroup = "NodeGroup",
                    sinksRight = FALSE, 
                    LinkGroup = "group",
                    #nodeWidth = 40,
                    #width=1500, height=500,
                    #margin = list("right"=250),
                    iterations = FALSE)

onRender(sn,
         '
  function(el, x) {
    var sankey = this.sankey;
    var path = sankey.link();
    var nodes = d3.selectAll(".node");
    var link = d3.selectAll(".link")
    var width = el.getBoundingClientRect().width - 40;
    var height = el.getBoundingClientRect().height - 40;

    window.dragmove = function(d) {
      d3.select(this).attr("transform", 
        "translate(" + (
           d.x = Math.max(0, Math.min(width - d.dx, d3.event.x))
            ) + "," + (
            d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))
          ) + ")");
      sankey.relayout();
      link.attr("d", path);
    };

    nodes.call(d3.drag()
      .subject(function(d) { return d; })
      .on("start", function() { this.parentNode.appendChild(this); })
      .on("drag", dragmove));
  }
  '
)

Node positions can be moved in the Viewer window on RStudio, however the resolution is low when using the Export > Save as Image option, or when using a screenshot:

I have also tried exporting the sankey plot to html file, in order to customise and export as an image using the webshot package. However, changing the horizontal position of nodes is disabled and the new node positions are not preserved in the image export:

saveWidget(sn, "SankeyNetwork.html")

library(webshot)
webshot("SankeyNetwork.html", "sn.png", delay = 0.2)

I would be grateful if anyone can suggest a way to export the customised node positions as a high-resolution image and html file. Thank you in advance for your help.

Preserve custom node placement of a sankeyNetwork (networkD3) in R

0 Answers0