如何使用d3.js可视化JSON树形图?

时间:2018-09-06 15:43:36

标签: javascript json d3.js networkx

tl; dr

  • 如何使Radial Tidy Tree处理来自networkxnode_link_data(G[, attrs])tree_data(G, root[, attrs])的JSON树数据?

  • 如何使D3 Cluster Dendrogram处理来自networkxnode_link_data(G[, attrs])tree_data(G, root[, attrs])的JSON树数据?

  • 如何使D3 Tidy Tree处理来自networkxnode_link_data(G[, attrs])tree_data(G, root[, attrs])的JSON树数据?

示例不使用JSON格式,而是CSV风格的输入。

长版

嗨,

我正在使用Python和networkx来生成图形数据(通常是树状图)。我可以使用their page上提到的networkx函数将数据导出到JSON:

  • node_link_data(G[, attrs]):以适用于JSON序列化并在Javascript文档中使用的节点链接格式返回数据。
  • adjacency_data(G[, attrs]):以适合JSON序列化并在Javascript文档中使用的邻接格式返回数据。
  • tree_data(G, root[, attrs]):以树格式返回适合JSON序列化并在Javascript文档中使用的数据。

networkx的文档明确提到:

  

像d3.js示例https://bl.ocks.org/mbostock/4063550

中的树

但是,linked example似乎并没有使用JSON树格式,而是使用了csv type of input。由于我的javascript-skilz本质上为零,因此我不了解如何使Mike Bostock的示例与我拥有的JSON数据一起使用。你能帮忙吗?

示例JSON

{
  "issueid": "3295658",
  "issuetype": "Portfolio-Epic",
  "status": "In Progress",
  "pirank": 24,
  "id": "ATROB-2523",
  "children": [
    {
      "issueid": "3288189",
      "issuetype": "Epic",
      "status": "Implementation",
      "id": "ATTDATA-233",
      "children": [
        {
          "issueid": "3305730",
          "issuetype": "Task",
          "status": "Implementation",
          "id": "ATTDATA-363"
        },
        {
          "issueid": "3305723",
          "issuetype": "Task",
          "status": "Open",
          "id": "ATTDATA-361"
        },
        {
          "issueid": "3301728",
          "issuetype": "Task",
          "status": "Open",
          "id": "ATTDATA-336"
        },
        {
          "issueid": "3297381",
          "issuetype": "Task",
          "status": "Closed",
          "id": "ATTDATA-300"
        },
        {
          "issueid": "3295913",
          "issuetype": "Task",
          "status": "Review",
          "id": "ATTDATA-290"
        },
        {
          "issueid": "3295893",
          "issuetype": "Task",
          "status": "Open",
          "id": "ATTDATA-289"
        },
        {
          "issueid": "3291658",
          "issuetype": "Task",
          "status": "Closed",
          "id": "ATTDATA-256"
        },
        {
          "issueid": "3291653",
          "issuetype": "Task",
          "status": "Closed",
          "id": "ATTDATA-255"
        },
        {
          "issueid": "3291530",
          "issuetype": "Task",
          "status": "Open",
          "id": "ATTDATA-253"
        },
        {
          "issueid": "3290232",
          "issuetype": "Task",
          "status": "Open",
          "id": "ATTDATA-247"
        },
        {
          "issueid": "3287061",
          "issuetype": "Task",
          "status": "Resolved",
          "id": "ATTDATA-226"
        }
      ]
    },
    {
      "issueid": "3300899",
      "issuetype": "Request",
      "status": "REJECTED",
      "id": "ATI-1478"
    }
  ]
}

1 个答案:

答案 0 :(得分:2)

Mike Bostock的链接示例使用d3.stratify将CSV数据转换为分层形式:

var stratify = d3.stratify()
    .parentId(function(d) { return d.id.substring(0, d.id.lastIndexOf(".")); });

[... later in the code...]


var root = tree(stratify(root));

在您的情况下,您的数据已经是分层形式的,因此您可以通过d3.hierarchy来运行它,以将其转换为d3型分层结构,然后使用它来创建图表:

var root = tree(d3.hierarchy(data));

您还需要将提取数据的功能从d3.csv更改为d3.json

// assume your data is in `data.json`
d3.json("data.json", function(error, data) {

所以脚本的顶部现在看起来像这样:

<script type="text/javascript">

var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height"),
    g = svg.append("g").attr("transform", "translate(" + (width / 2 + 40) + "," + (height / 2 + 90) + ")");

var tree = d3.tree()
    .size([2 * Math.PI, 300])
    .separation(function(a, b) { return (a.parent == b.parent ? 1 : 2) / a.depth; });

d3.json("data.json", function(error, data) {
  if (error) throw error;

  var root = tree(d3.hierarchy(data));

Here's a .block和上面提供的JSON数据中的树。