Javascript 颜色链接与d3 sankey绘图的原点节点相同

我有一个sankey图，我已经能够通过在我的json对象中添加一个color-key:value对来更改节点的颜色，现在我尝试对我的链接执行相同的操作。我的想法是，我可以做同样的事情，即添加一个颜色键：值对到带有原点颜色的链接，然后我就可以将链接的颜色设置为与它们的原点节点相同的颜色

下面是我的json对象。您可以看到每个链接的颜色与links.source=nodes.name所在节点的颜色相匹配

通过修改注释\修改节点颜色的行，我能够根据json对象节点部分中的颜色为节点着色

虽然看起来同样的策略对链接不起作用？也许是吧？有人对我所描述的链接的颜色有什么想法吗

JSON

{
 "links": [
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "Android Mobile", 
   "value": "2152.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "Android Tablet", 
   "value": "5.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "IPad", 
   "value": "102.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "Computer", 
   "value": "26005.0"
  }, 
  {
   "color": "#B95EA4", 
   "source": "Computer ", 
   "target": "Android Tablet", 
   "value": "7681.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "IPhone", 
   "value": "23.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "Android Mobile", 
   "value": "24634.3"
  }, 
  {
   "color": "#B95EA4", 
   "source": "Computer ", 
   "target": "Android Mobile", 
   "value": "29165.0"
  }, 
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "IPad", 
   "value": "1312.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "Android Mobile", 
   "value": "576.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "Android Tablet", 
   "value": "209.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "Windows Mobile", 
   "value": "2007.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "Windows Mobile", 
   "value": "1.0"
  }, 
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "Computer", 
   "value": "21400.0"
  }, 
  {
   "color": "#B95EA4", 
   "source": "Computer ", 
   "target": "IPhone", 
   "value": "40140.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "Computer", 
   "value": "7234.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "IPad", 
   "value": "210.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "Windows Mobile", 
   "value": "10.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "IPad", 
   "value": "20216.0"
  }, 
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "Android Tablet", 
   "value": "201.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "Windows Mobile", 
   "value": "17.0"
  }, 
  {
   "color": "#B95EA4", 
   "source": "Computer ", 
   "target": "Windows Mobile", 
   "value": "843.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "Computer", 
   "value": "2468.0"
  }, 
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "Windows Mobile", 
   "value": "40.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "IPhone", 
   "value": "1194.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "IPad", 
   "value": "22.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "Android Mobile", 
   "value": "426.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "Android Tablet", 
   "value": "57.0"
  }, 
  {
   "color": "#B95EA4", 
   "source": "Computer ", 
   "target": "IPad", 
   "value": "40995.0"
  }, 
  {
   "color": "#0092D0", 
   "source": "Android Mobile ", 
   "target": "IPhone", 
   "value": "259.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "IPhone", 
   "value": "202.0"
  }, 
  {
   "color": "#D2232A", 
   "source": "Windows Mobile ", 
   "target": "Android Mobile", 
   "value": "152.0"
  }, 
  {
   "color": "#CBC911", 
   "source": "Android Tablet ", 
   "target": "Android Tablet", 
   "value": "4681.0"
  }, 
  {
   "color": "#F79131", 
   "source": "IPad ", 
   "target": "Computer", 
   "value": "20344.0"
  }, 
  {
   "color": "#00A651", 
   "source": "IPhone ", 
   "target": "IPhone", 
   "value": "115632.0"
  }
 ], 
 "nodes": [
  {
   "color": "#0092D0", 
   "name": "Android Mobile"
  }, 
  {
   "color": "#0092D0", 
   "name": "Android Mobile "
  }, 
  {
   "color": "#CBC911", 
   "name": "Android Tablet"
  }, 
  {
   "color": "#CBC911", 
   "name": "Android Tablet "
  }, 
  {
   "color": "#B95EA4", 
   "name": "Computer"
  }, 
  {
   "color": "#B95EA4", 
   "name": "Computer "
  }, 
  {
   "color": "#F79131", 
   "name": "IPad"
  }, 
  {
   "color": "#F79131", 
   "name": "IPad "
  }, 
  {
   "color": "#00A651", 
   "name": "IPhone"
  }, 
  {
   "color": "#00A651", 
   "name": "IPhone "
  }, 
  {
   "color": "#D2232A", 
   "name": "Windows Mobile"
  }, 
  {
   "color": "#D2232A", 
   "name": "Windows Mobile "
  }
 ]
}

INDEX.HTML

<!DOCTYPE html>
<meta charset="utf-8">
<script>

.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;
}

</script>

<body>

<p id="chart">

<script src="http://d3js.org/d3.v3.js"></script>
<script src="sankey.js"></script>
<script>

var units = "ABC";

var margin = {top: 10, right: 10, bottom: 10, left: 10},
    width = 1200 - margin.left - margin.right,
    height = 740 - margin.top - margin.bottom;

var formatNumber = d3.format(",.0f"),    // zero decimal places
    format = function(d) { return formatNumber(d) + " " + units; },
    color = d3.scale.category10();

// 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(36)
    .nodePadding(10)
    .size([width, height]);

var path = sankey.link();

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

    var nodeMap = {};
    graph.nodes.forEach(function(x) { nodeMap[x.name] = x; });
    graph.links = graph.links.map(function(x) {
      return {
        source: nodeMap[x.source],
        target: nodeMap[x.target],
        value: x.value
      };
    });

  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;}) // modified node color
      .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 = 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);
  }
});

</script>

</body>
</html>

.node rect{
光标：移动；
填充不透明度：.9；
形状渲染：边缘清晰；
}
.节点文本{
指针事件：无；
文本阴影：0 1px 0#fff；
}
.链接{
填充：无；
行程：#000；
笔画不透明度：.2；
}
.link:悬停{
笔画不透明度：.5；
}

var units=“ABC”；
var margin={顶部：10，右侧：10，底部：10，左侧：10}，
宽度=1200-margin.left-margin.right，
高度=740-margin.top-margin.bottom；
var formatNumber=d3.format（“，.0f”），//小数点后零位
format=函数（d）{返回formatNumber（d）+“”+单位；}，
颜色=d3.scale.category10（）；
//将svg画布追加到页面
var svg=d3.选择（“图表”）.追加（“svg”）
.attr（“宽度”，宽度+边距。左侧+边距。右侧）
.attr（“高度”，高度+边距。顶部+边距。底部）
.附加（“g”）
.attr（“转换”，
“翻译（“+margin.left+”，“+margin.top+”）；
//设置sankey图表属性
var sankey=d3.sankey（）
.诺德维特（36）
.nodePadding（10）
.尺寸（[宽度、高度]）；
var path=sankey.link（）；
//加载数据
d3.json（“xd_json.json”），函数（错误，图形）{
var nodeMap={}；
forEach（函数（x）{nodeMap[x.name]=x；}）；
graph.links=graph.links.map（函数（x）{
返回{
来源：nodeMap[x.source]，
目标：nodeMap[x.target]，
值：x.value
};
});
桑基
.nodes（图.nodes）
.links（graph.links）
.布局（32）；
//添加链接
var link=svg.append（“g”）.selectAll（“link”）
.数据（图表.链接）
.enter（）.append（“路径”）
.attr（“类”、“链接”）
.attr（“d”，路径）
.style（“笔划宽度”，函数（d）{return Math.max（1，d.dy）；}）
.sort（函数（a，b）{返回b.dy-a.dy；}）；
//添加链接标题
链接。附加（“标题”）
.文本（功能（d）{
返回d.source.name+”→ " + 
d、 target.name+“\n”+格式（d.value）；}）；
//添加节点
var node=svg.append（“g”）.selectAll（“node”）
.数据（图.节点）
.enter（）.append（“g”）
.attr（“类”、“节点”）
.attr（“转换”，函数（d）{
返回“translate”（“+d.x+”，“+d.y+”）；}）
.call（d3.behavior.drag（））
.origin（函数（d）{return d；}）
.on（“dragstart”，函数（）{
this.parentNode.appendChild（this）；}）
.在（“拖动”，拖动）上）；
//为节点添加矩形
node.append（“rect”）
.attr（“高度”，函数（d）{返回d.dy；}）
.attr（“宽度”，sankey.nodeWidth（））
.style（“fill”，函数（d）{return d.color；}）//修改的节点颜色
.style（“笔划”，函数（d）{
返回d3.rgb（d.color）.dark（2）；}）
.附加（“标题”）
.text（功能（d）{
返回d.name+“\n”+格式（d.value）；}）；
//添加节点的标题
node.append（“文本”）
.attr（“x”，-6）
.attr（“y”，函数（d）{返回d.dy/2；}）
.attr（“dy”，“.35em”）
.attr（“文本锚定”、“结束”）
.attr（“转换”，null）
.text（函数（d）{返回d.name；}）
.filter（函数（d）{返回d.x

SANKEY.JS

d3.sankey = function() {
  var sankey = {},
      nodeWidth = 24,
      nodePadding = 8,
      size = [1, 1],
      nodes = [],
      links = [];

  sankey.nodeWidth = function(_) {
    if (!arguments.length) return nodeWidth;
    nodeWidth = +_;
    return sankey;
  };

  sankey.nodePadding = function(_) {
    if (!arguments.length) return nodePadding;
    nodePadding = +_;
    return sankey;
  };

  sankey.nodes = function(_) {
    if (!arguments.length) return nodes;
    nodes = _;
    return sankey;
  };

  sankey.links = function(_) {
    if (!arguments.length) return links;
    links = _;
    return sankey;
  };

  sankey.size = function(_) {
    if (!arguments.length) return size;
    size = _;
    return sankey;
  };

  sankey.layout = function(iterations) {
    computeNodeLinks();
    computeNodeValues();
    computeNodeBreadths();
    computeNodeDepths(iterations);
    computeLinkDepths();
    return sankey;
  };

  sankey.relayout = function() {
    computeLinkDepths();
    return sankey;
  };

  sankey.link = function() {
    var curvature = .5;

    function link(d) {
      var x0 = d.source.x + d.source.dx,
          x1 = d.target.x,
          xi = d3.interpolateNumber(x0, x1),
          x2 = xi(curvature),
          x3 = xi(1 - curvature),
          y0 = d.source.y + d.sy + d.dy / 2,
          y1 = d.target.y + d.ty + d.dy / 2;
      return "M" + x0 + "," + y0
           + "C" + x2 + "," + y0
           + " " + x3 + "," + y1
           + " " + x1 + "," + y1;
    }

    link.curvature = function(_) {
      if (!arguments.length) return curvature;
      curvature = +_;
      return link;
    };

    return link;
  };

  // Populate the sourceLinks and targetLinks for each node.
  // Also, if the source and target are not objects, assume they are indices.
  function computeNodeLinks() {
    nodes.forEach(function(node) {
      node.sourceLinks = [];
      node.targetLinks = [];
    });
    links.forEach(function(link) {
      var source = link.source,
          target = link.target;
      if (typeof source === "number") source = link.source = nodes[link.source];
      if (typeof target === "number") target = link.target = nodes[link.target];
      source.sourceLinks.push(link);
      target.targetLinks.push(link);
    });
  }

  // Compute the value (size) of each node by summing the associated links.
  function computeNodeValues() {
    nodes.forEach(function(node) {
      node.value = Math.max(
        d3.sum(node.sourceLinks, value),
        d3.sum(node.targetLinks, value)
      );
    });
  }

  // Iteratively assign the breadth (x-position) for each node.
  // Nodes are assigned the maximum breadth of incoming neighbors plus one;
  // nodes with no incoming links are assigned breadth zero, while
  // nodes with no outgoing links are assigned the maximum breadth.
  function computeNodeBreadths() {
    var remainingNodes = nodes,
        nextNodes,
        x = 0;

    while (remainingNodes.length) {
      nextNodes = [];
      remainingNodes.forEach(function(node) {
        node.x = x;
        node.dx = nodeWidth;
        node.sourceLinks.forEach(function(link) {
          nextNodes.push(link.target);
        });
      });
      remainingNodes = nextNodes;
      ++x;
    }

    //
    moveSinksRight(x);
    scaleNodeBreadths((size[0] - nodeWidth) / (x - 1));
  }

  function moveSourcesRight() {
    nodes.forEach(function(node) {
      if (!node.targetLinks.length) {
        node.x = d3.min(node.sourceLinks, function(d) { return d.target.x; }) - 1;
      }
    });
  }

  function moveSinksRight(x) {
    nodes.forEach(function(node) {
      if (!node.sourceLinks.length) {
        node.x = x - 1;
      }
    });
  }

  function scaleNodeBreadths(kx) {
    nodes.forEach(function(node) {
      node.x *= kx;
    });
  }

  function computeNodeDepths(iterations) {
    var nodesByBreadth = d3.nest()
        .key(function(d) { return d.x; })
        .sortKeys(d3.ascending)
        .entries(nodes)
        .map(function(d) { return d.values; });

    //
    initializeNodeDepth();
    resolveCollisions();
    for (var alpha = 1; iterations > 0; --iterations) {
      relaxRightToLeft(alpha *= .99);
      resolveCollisions();
      relaxLeftToRight(alpha);
      resolveCollisions();
    }

    function initializeNodeDepth() {
      var ky = d3.min(nodesByBreadth, function(nodes) {
        return (size[1] - (nodes.length - 1) * nodePadding) / d3.sum(nodes, value);
      });

      nodesByBreadth.forEach(function(nodes) {
        nodes.forEach(function(node, i) {
          node.y = i;
          node.dy = node.value * ky;
        });
      });

      links.forEach(function(link) {
        link.dy = link.value * ky;
      });
    }

    function relaxLeftToRight(alpha) {
      nodesByBreadth.forEach(function(nodes, breadth) {
        nodes.forEach(function(node) {
          if (node.targetLinks.length) {
            var y = d3.sum(node.targetLinks, weightedSource) / d3.sum(node.targetLinks, value);
            node.y += (y - center(node)) * alpha;
          }
        });
      });

      function weightedSource(link) {
        return center(link.source) * link.value;
      }
    }

    function relaxRightToLeft(alpha) {
      nodesByBreadth.slice().reverse().forEach(function(nodes) {
        nodes.forEach(function(node) {
          if (node.sourceLinks.length) {
            var y = d3.sum(node.sourceLinks, weightedTarget) / d3.sum(node.sourceLinks, value);
            node.y += (y - center(node)) * alpha;
          }
        });
      });

      function weightedTarget(link) {
        return center(link.target) * link.value;
      }
    }

    function resolveCollisions() {
      nodesByBreadth.forEach(function(nodes) {
        var node,
            dy,
            y0 = 0,
            n = nodes.length,
            i;

        // Push any overlapping nodes down.
        nodes.sort(ascendingDepth);
        for (i = 0; i < n; ++i) {
          node = nodes[i];
          dy = y0 - node.y;
          if (dy > 0) node.y += dy;
          y0 = node.y + node.dy + nodePadding;
        }

        // If the bottommost node goes outside the bounds, push it back up.
        dy = y0 - nodePadding - size[1];
        if (dy > 0) {
          y0 = node.y -= dy;

          // Push any overlapping nodes back up.
          for (i = n - 2; i >= 0; --i) {
            node = nodes[i];
            dy = node.y + node.dy + nodePadding - y0;
            if (dy > 0) node.y -= dy;
            y0 = node.y;
          }
        }
      });
    }

    function ascendingDepth(a, b) {
      return a.y - b.y;
    }
  }

  function computeLinkDepths() {
    nodes.forEach(function(node) {
      node.sourceLinks.sort(ascendingTargetDepth);
      node.targetLinks.sort(ascendingSourceDepth);
    });
    nodes.forEach(function(node) {
      var sy = 0, ty = 0;
      node.sourceLinks.forEach(function(link) {
        link.sy = sy;
        sy += link.dy;
      });
      node.targetLinks.forEach(function(link) {
        link.ty = ty;
        ty += link.dy;
      });
    });

    function ascendingSourceDepth(a, b) {
      return a.source.y - b.source.y;
    }

    function ascendingTargetDepth(a, b) {
      return a.target.y - b.target.y;
    }
  }

  function center(node) {
    return node.y + node.dy / 2;
  }

  function value(link) {
    return link.value;
  }

  return sankey;
};

d3.sankey=function（）{
var sankey={}，
nodeWidth=24，
nodePadding=8，
大小=[1,1]，
节点=[]，
链接=[]；
sankey.nodeWidth=函数{
如果（！arguments.length）返回nodeWidth；
节点宽度=+；
返回sankey；
};
sankey.nodePadding=函数（\ux）{
如果（！arguments.length）返回nodePadding；
nodePadding=+\u3；
返回sankey；
};
sankey.nodes=函数（\ux）{
如果（！arguments.length）返回节点；
节点=33;；
返回sankey；
};
sankey.links=函数（\ux）{
如果（！arguments.length）返回链接；
链接=u；
返回sankey；
};
sankey.size=函数（\ux）{
如果（！arguments.length）返回大小；
大小=u2;；
返回sankey；
};
sankey.layout=函数（迭代次数）{
computeNodeLinks（）；
货币贬值（）；
computeNodeBreadths（）；
计算深度（迭代）；
计算链接深度（）；
返回sankey；
};
sankey.relayat=函数（）{
计算链接深度（）；
返回sankey；
};
sankey.link=函数（）{
var曲率=.5；
功能链接（d）{
var x0=d.source.x+d.source.dx，
x1=d.target.x，
席＝D3.插值数（x0，x1），
x2=xi（曲率），
x3=xi（1-曲率），
y0=d.source.y+d.sy+d.dy/2，
y1=d.target.y+d.ty+d.dy/2；
返回“M”+x0+“，“+y0”
+“C”+x2+，“+y0
+“+x3+”，“+y1”
+“+x1+”，“+y1；
}
  var link = svg.append("g").selectAll(".link")
      .data(graph.links)
    .enter().append("path")
      .attr("class", "link")
      .attr("d", path)
      .style("stroke", function(d){return d.color;})//add this to return the color of link
      .style("stroke-width", function(d) { return Math.max(1, d.dy); })
      .sort(function(a, b) { return b.dy - a.dy; });

graph.links = graph.links.map(function(x) {
  return {
    source: nodeMap[x.source],
    target: nodeMap[x.target],
    value: x.value,
    color: x.color //get the color in the json fo links
  };
});