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这与我之前的问题“使用 d3.js（1 和 2）创建桑基图的问题”有关

在这里，我试图复制 Malcolm Maclean 在他的“D3 Tips and Tricks”一书中提供的示例，他对“sankey-formatted-json”的实现有效，我的没有：>）

我的测试数据集（TestDrive_ext'json）是

{
"nodes":[
{"node":0,"name":"node0"},
{"node":1,"name":"node1"},
{"node":2,"name":"node2"},
{"node":3,"name":"node3"},
{"node":4,"name":"node4"},
{"node":5,"name":"node5"},
{"node":6,"name":"node6"},
{"node":7,"name":"node7"},
{"node":8,"name":"node8"},
{"node":9,"name":"node9"},
{"node":10,"name":"node10"},
{"node":11,"name":"node11"},
{"node":12,"name":"node12"},
{"node":13,"name":"node13"},
{"node":14,"name":"node14"},
{"node":15,"name":"node15"},
{"node":16,"name":"node16"},
{"node":17,"name":"node17"}
],
"links":[
{"source":3,"target":0,"value":1},
{"source":3,"target":1,"value":2},
{"source":5,"target":1,"value":1},
{"source":0,"target":2,"value":1},
{"source":3,"target":2,"value":1},
{"source":4,"target":2,"value":1},
{"source":16,"target":2,"value":1},
{"source":4,"target":3,"value":4},
{"source":7,"target":3,"value":1},
{"source":12,"target":3,"value":1},
{"source":10,"target":4,"value":1},
{"source":12,"target":4,"value":1},
{"source":13,"target":4,"value":1},
{"source":1,"target":5,"value":1},
{"source":16,"target":5,"value":1},
{"source":13,"target":6,"value":1},
{"source":14,"target":6,"value":1},
{"source":0,"target":7,"value":1},
{"source":2,"target":7,"value":1},
{"source":12,"target":7,"value":1},
{"source":4,"target":8,"value":1},
{"source":16,"target":10,"value":1},
{"source":11,"target":12,"value":1},
{"source":15,"target":12,"value":1},
{"source":7,"target":13,"value":2},
{"source":11,"target":13,"value":1},
{"source":6,"target":14,"value":2},
{"source":0,"target":15,"value":2},
{"source":6,"target":15,"value":3},
{"source":9,"target":15,"value":1},
{"source":12,"target":15,"value":3},
{"source":4,"target":16,"value":1},
{"source":5,"target":16,"value":1},
{"source":9,"target":16,"value":1},
{"source":10,"target":16,"value":1},
{"source":1,"target":17,"value":1},
{"source":6,"target":17,"value":1}
]}

从 Malcolm 的示例中复制的代码是

<!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>

<p id="chart">

<script type="text/javascript" src="d3/d3.v3.js"></script>
<script src="js/sankey.js"></script>
<script>

var units = "Widgets";

var margin = {top: 10, right: 10, bottom: 10, left: 10},
    width = 700 - margin.left - margin.right,
    height = 300 - margin.top - margin.bottom;

var formatNumber = d3.format(",.0f"),    // zero decimal places
    format = function(d) { return formatNumber(d) + " " + units; },
    color = d3.scale.category20();

// append the svg canvas to the page
var svg = d3.select("#chart").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(15)
    .nodePadding(10)
    .size([width, height]);

var path = sankey.link();

// load the data
d3.json("data/TestDrive_ext.json", function(error, graph) {

  sankey
      .nodes(graph.nodes)
      .links(graph.links)
      .layout(32);


// 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, 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); });

// 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.behavior.drag()
      .origin(function(d) { return d; })
      .on("dragstart", function() { 
          this.parentNode.appendChild(this); })
      .on("drag", dragmove));

// add the rectangles for the nodes
  node.append("rect")
      .attr("height", function(d) { return d.dy; })
      .attr("width", sankey.nodeWidth())
      .style("fill", function(d) { 
          return d.color = color(d.name.replace(/ .*/, "")); })
      .style("stroke", function(d) { 
          return d3.rgb(d.color).darker(2); })
    .append("title")
      .text(function(d) { 
          return d.name + "\n" + format(d.value); });

// 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", 6 + sankey.nodeWidth())
      .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>
</html>

同样，这不会在 Javascript 控制台中引发任何错误，但图表不会呈现，但正如我之前所说的那样 Malcolm 的

一个 jsFiddle，我不太明白如何解释，可在http://jsfiddle.net/Dzy82f/z6bEx/

再一次，任何能帮助我理解我哪里出错的见解都将不胜感激

非常感谢

朱利安

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0 回答 0