D3 Examples - Sankey modifications

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<!DOCTYPE html>
<meta charset="utf-8">
<title>SANKEY Experiment</title>
<style>
​
.node rect {
  cursor: move;
  fill-opacity: .9;
  shape-rendering: crispEdges;
}
​
.node text {
  pointer-events: none;
  text-shadow: 0 1px 0 #fff;
}
​
.link {
  fill: none;
  stroke: #000;
  stroke-opacity: .2;
}
​
.link:hover {
  stroke-opacity: .5;
}
​
</style>
<body>
​
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<script src="sankey.js"></script>
<script>
    
var units = "calls";
​
// set the dimensions and margins of the graph
var margin = {top: 10, right: 10, bottom: 10, left: 10},
    width = 2700 - margin.left - margin.right,
    height = 2000 - margin.top - margin.bottom;
​
var formatNumber = d3.format(",.0f"),    // zero decimal places
    format = function(d) { return formatNumber(d) + " " + units; },
    formatPercent = d3.format(",.5f"),
    ratetoPercent = function(d) { return formatPercent(100 * d) + "%"; };
​
// append the svg object to the body of the page
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", 
          "translate(" + margin.left + "," + margin.top + ")");
​
// Set the sankey diagram properties
var sankey = d3.sankey()
    .nodeWidth(10)
    .nodePadding(15)
    .size([width, height]);
​
​
var path = function(d) { 
                    return linkVertical({"x":d.source.x + sankey.nodeWidth() / 2,
                                 "y":d.source.y  + d.source.dy / 2}, 
                                {"x":d.target.x + sankey.nodeWidth() / 2,
                                 "y":d.target.y + d.target.dy / 2});
};
  
  // Creates a curved (diagonal) path from parent to the child nodes
    function linkHorizontal(source, target) {
    return "M" + source.x + "," + source.y
       + "C" + source.x +  "," + (source.y + target.y) / 2
       + " " + target.x + "," + (source.y + target.y) / 2
       + " " + target.x + "," + target.y;
    }
  
  function linkVertical(source, target) {
  return "M" + source.x + "," + source.y
      + "C" + (source.x + target.x) / 2 + "," + source.y
      + " " + (source.x + target.x) / 2 + "," + target.y
      + " " + target.x + "," + target.y;
    }
//var path = sankey.link();
​
// load the data
d3.json("albany04.json", function(error, graph) {
​
  sankey
      .nodes(graph.nodes)
      .links(graph.links)
      .layout(56);
​
// add in the links
  var link = svg.append("g").selectAll(".link")
      .data(graph.links)
    .enter().append("path")
      .attr("class", "link")
      .attr("d", path)
      .style("stroke-width", function(d) { return Math.max(1, Math.sqrt(d.dy)); })
      .sort(function(a, b) { return b.dy - a.dy; });
​
// add the link titles
  link.append("title")
        .text(function(d) {
            return d.source.name + " → " + 
                d.target.name + "\n" + format(d.value) +        
                 (d.capturedigit_digit == "0" ? 
                          "" : ("\nKeypress: " + d.capturedigit_digit)); });
​
// add in the nodes
  var node = svg.append("g").selectAll(".node")
      .data(graph.nodes)
    .enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { 
          return "translate(" + d.x + "," + d.y + ")"; })
      .call(d3.drag()
        .subject(function(d) {
          return d;
        })
        .on("start", function() {
          this.parentNode.appendChild(this);
        })
        .on("drag", dragmove));
​
// add the circles for the nodes
  node.append("circle")
        .attr("cx", sankey.nodeWidth()/2)
        .attr("cy", function(d) {
                return d.dy/2;
        })
        .attr("r", function(d) {
                return Math.sqrt(d.dy);
        })
      .style("fill", function(d) {
          return d.color = d3.interpolateRdYlGn(1 - d.hanguprate); })
      .style("stroke", function(d) { 
          return d3.rgb(d.color).darker(2); })
    .append("title")
      .text(function(d) { 
          return d.name + "\n" + format(d.value) + "\n" + ratetoPercent(d.repeatrate) +" repeated\n" + ratetoPercent(d.hanguprate) + " hung up";});
​
​
// add in the title for the nodes
  node.append("text")
      .attr("x", -6)
      .attr("y", function(d) { return d.dy / 2; })
      .attr("dy", ".35em")
      .attr("text-anchor", "end")
      .attr("transform", null)
      .text(function(d) { return d.name; })
    .filter(function(d) { return d.x < width / 2; })
      .attr("x", function(d) { return 6 + sankey.nodeWidth() + Math.sqrt(d.dy);})
      .attr("text-anchor", "start");
​
// the function for moving the nodes
  function dragmove(d) {
    d3.select(this)
      .attr("transform", 
            "translate(" 
               + d.x + "," 
               + (d.y = Math.max(
                  0, Math.min(height - d.dy, d3.event.y))
                 ) + ")");
    sankey.relayout();
    link.attr("d", path);
  }  
});
  
</script>
​
</body>
​
​
    