Question

鉴于Mike Bostock关于分层边缘捆绑（https://bl.ocks.org/mbostock/7607999）的例子，如何在情节中添加量化维度？

我想要实现的是，例如，“Visualization”（12点钟位置）和“SpanningTree”（1点钟位置）之间的链接）具有50％的透明度和“可视化”和“AspectRatioBanker”（也是1点钟）之间的链接，具有0％的透明度。假设“SpanningTree”是“Visualization”的重要性，而不是“AspectRatiobanker”，我希望使用此渐变颜色可视化此方面规模。

考虑到数据，"imports"数组中的每个元素都必须具有数值，表示该元素的“重要性”。

考虑到d3，每个链接都必须根据此数值进行着色。

是否有可能在不改变过多示例代码的情况下添加此类功能？

Answer 1

如果我正确理解您的问题，您可以从以下数据开始：

[
  {
    "name": "flare.analytics.cluster.AgglomerativeCluster",
    "size": 3938,
    "imports": [
      {
        "link": "flare.animate.Transitioner",
        "value": 47.194114234125514
      },
      {
        "link": "flare.vis.data.DataList",
        "value": 66.57002100495298
      },
      {
        "link": "flare.util.math.IMatrix",
        "value": 5.987508739765435
      },
      {
        "link": "flare.analytics.cluster.MergeEdge",
        "value": 31.750046370493678
      },
      {
        "link": "flare.analytics.cluster.HierarchicalCluster",
        "value": 10.186873728884827
      },
      {
        "link": "flare.vis.data.Data",
        "value": 28.60757703865271
      }
    ]
  },
  ...

然后根据导入中的value属性为链接着色。

要在链接示例的基础上执行此操作，请修改packageImports函数以保留links集合中的value属性：

// Return a list of imports for the given array of nodes.
function packageImports(nodes) {
  var map = {},
      imports = [];

  // Compute a map from name to node.
  nodes.forEach(function(d) {
    map[d.name] = d;
  });

  // For each import, construct a link from the source to target node.
  nodes.forEach(function(d) {
    if (d.imports) d.imports.forEach(function(i) {
      var target = map[i.link]; // find the target
      target.value = i.value; // retain the value
      imports.push({source: map[d.name], target: target});
    });
  });
  return imports;
}

然后在追加节点时添加颜色：

var colorScale = d3.scale.quantize()
  .range(["#2c7bb6", "#00a6ca","#00ccbc","#90eb9d","#ffff8c","#f9d057","#f29e2e","#e76818","#d7191c"])
  .domain([0,100]);

...

link = link
  .data(bundle(links))
  .enter().append("path")
  .each(function(d) { d.source = d[0], d.target = d[d.length - 1]; })
  .attr("class", "link")
  .attr("d", line)
  .style("stroke", function(d){
    return colorScale(d.target.value); //<-- add color
  });

完整运行代码：

＆＃13;

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.node {
  font: 300 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
  fill: #bbb;
}

.node:hover {
  fill: #000;
}

.link {
  fill: none;
  pointer-events: none;
}

.node:hover,
.node--source,
.node--target {
  font-weight: 700;
}

.link--source,
.link--target {
  stroke-opacity: 1;
  stroke-width: 2px;
}

.link--source {
  stroke: #d62728;
}

.link--target {
  stroke: #2ca02c;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var diameter = 960,
    radius = diameter / 2,
    innerRadius = radius - 120;

var cluster = d3.layout.cluster()
    .size([360, innerRadius])
    .sort(null)
    .value(function(d) { return d.size; });

var bundle = d3.layout.bundle();

var line = d3.svg.line.radial()
    .interpolate("bundle")
    .tension(.85)
    .radius(function(d) { return d.y; })
    .angle(function(d) { return d.x / 180 * Math.PI; });

var svg = d3.select("body").append("svg")
    .attr("width", diameter)
    .attr("height", diameter)
  .append("g")
    .attr("transform", "translate(" + radius + "," + radius + ")");

var link = svg.append("g").selectAll(".link"),
    node = svg.append("g").selectAll(".node");

d3.json("https://jsonblob.com/api/851bd2f2-d85d-11e6-b16a-ad927fd57221", function(error, classes) {
  if (error) throw error;
  
  var nodes = cluster.nodes(packageHierarchy(classes)),
      links = packageImports(nodes);
      
  var colorScale = d3.scale.quantize()
    .range(["#2c7bb6", "#00a6ca","#00ccbc","#90eb9d","#ffff8c","#f9d057","#f29e2e","#e76818","#d7191c"])
    .domain([0,100]);

  link = link
      .data(bundle(links))
    .enter().append("path")
      .each(function(d) { d.source = d[0], d.target = d[d.length - 1]; })
      .attr("class", "link")
      .attr("d", line)
      .style("stroke", function(d){
        return colorScale(d.target.value);
      })

  node = node
      .data(nodes.filter(function(n) { return !n.children; }))
    .enter().append("text")
      .attr("class", "node")
      .attr("dy", ".31em")
      .attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + (d.y + 8) + ",0)" + (d.x < 180 ? "" : "rotate(180)"); })
      .style("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
      .text(function(d) { return d.key; })
      //.on("mouseover", mouseovered)
      //.on("mouseout", mouseouted);
});

/*
function mouseovered(d) {
  node
      .each(function(n) { n.target = n.source = false; });

  link
      .classed("link--target", function(l) { if (l.target === d) return l.source.source = true; })
      .classed("link--source", function(l) { if (l.source === d) return l.target.target = true; })
    .filter(function(l) { return l.target === d || l.source === d; })
      .each(function() { this.parentNode.appendChild(this); });

  node
      .classed("node--target", function(n) { return n.target; })
      .classed("node--source", function(n) { return n.source; });
}

function mouseouted(d) {
  link
      .classed("link--target", false)
      .classed("link--source", false);

  node
      .classed("node--target", false)
      .classed("node--source", false);
}
*/

//d3.select(self.frameElement).style("height", diameter + "px");

// Lazily construct the package hierarchy from class names.
function packageHierarchy(classes) {
  var map = {};

  function find(name, data) {
    var node = map[name], i;
    if (!node) {
      node = map[name] = data || {name: name, children: []};
      if (name.length) {
        node.parent = find(name.substring(0, i = name.lastIndexOf(".")));
        node.parent.children.push(node);
        node.key = name.substring(i + 1);
      }
    }
    return node;
  }

  classes.forEach(function(d) {
    find(d.name, d);
  });

  return map[""];
}

// Return a list of imports for the given array of nodes.
function packageImports(nodes) {
  var map = {},
      imports = [];

  // Compute a map from name to node.
  nodes.forEach(function(d) {
    map[d.name] = d;
  });

  // For each import, construct a link from the source to target node.
  nodes.forEach(function(d) {
    if (d.imports) d.imports.forEach(function(i) {
      var target = map[i.link];
      target.value = i.value;
      imports.push({source: map[d.name], target: target});
    });
  });
  return imports;
}

</script>

＆＃13;

d3js：为Hierarchical Edge Bundling添加定量维

1 个答案: