日期为 JSON 的 D3 v4 折线图

Question

我已经为此工作了几天，但我真的无法画出我的线条并且遇到了一些我无法破解的日期格式问题。

使用此 D3 v3 fiddle 作为灵感：http://jsfiddle.net/vmvp0zja/ 我试图将其转换为 D3 v4，但我无法正确绘制数据。

我想画几条线，但我连一条都画不出来..

你能看看我在这里遗漏了什么吗？谢谢！ :)

// JSON data:
var data = [
{"Date":"\/Date(1475272800000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475359200000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475445600000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475532000000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475618400000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475704800000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475791200000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475877600000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475964000000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1476050400000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1476136800000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1476223200000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1476309600000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1476396000000)\/","Open":0,"Closed":0},
{"Date":"\/Date(1475445600000)\/","Open":1,"Closed":0},
{"Date":"\/Date(1475532000000)\/","Open":1,"Closed":0},
{"Date":"\/Date(1475618400000)\/","Open":2,"Closed":0},
{"Date":"\/Date(1475791200000)\/","Open":9,"Closed":0},
{"Date":"\/Date(1475964000000)\/","Open":1,"Closed":0},
{"Date":"\/Date(1475445600000)\/","Open":0,"Closed":1},
{"Date":"\/Date(1475532000000)\/","Open":0,"Closed":1},
{"Date":"\/Date(1475618400000)\/","Open":0,"Closed":1},
{"Date":"\/Date(1475964000000)\/","Open":0,"Closed":1}]

这是我的 D3 烂摊子：

// linechart.js
var formatTime = d3.timeFormat("%Y-%m-%d");

    data.forEach(function (d) {
        var unixToISO = new Date(d.Date.match(/\d+/)[0]*1);
        d.Date = formatTime(unixToISO);
        d.Open = +d.Open;
        d.Closed = +d.Closed;
                console.log(d.Date);
        return d;
    });

    var margin = {top: 30, right: 40, bottom: 30, left: 50  },
       width = 600 - margin.left - margin.right,
       height = 270 - margin.top - margin.bottom;

    var x = d3.scaleTime()
        .range([0, width]);

    var y0 = d3.scaleLinear()
        .range([height, 0]);

    // Scale the range of the data
    x.domain(d3.extent(data, function (d) { return d.Date; }));
    y0.domain([
        d3.min(data, function (d) { return Math.min(d.Open); }),
        d3.max(data, function (d) { return Math.max(d.Open); })]);


    var valueline1 = d3.line()
      .x(function (d) { console.log(x(d.Date)); return x(d.Date); })
      .y(function (d) { return y(d.Open); });

    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 + ")");

    svg.append("g") // Add the X Axis
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

    svg.append("g")
      .attr("class", "y axis")
      .style("fill", "steelblue")
      .call(d3.axisLeft(y0));

    svg.append("path") // Add the valueline path.
      .data(data)
      .attr("class", "line")
      .attr("d", valueline1);

在此先感谢帮助。我可能忽略了一些明显的东西。谢谢！

Answer 1

变化：

data.forEach(function(d) {
  var unixToISO = new Date(d.Date.match(/\d+/)[0] * 1);
  d.Date = unixToISO; // here
  d.Open = +d.Open;

// (...)
var valueline1 = d3.line()
  .x(function(d) {
    console.log(x(d.Date));
    return x(d.Date);
  })
  .y(function(d) {
    return y0(d.Open); // here
  });

// (...)
svg.append("path")
  .data([data]) // here
  .attr("class", "line")
  .attr("d", valueline1);

并添加了带有

的 x 轴标签

svg.append("text")
  .attr("transform", "translate(" + (width / 2) + " ," +
    (height + margin.top + 20) + ")")
  .style("text-anchor", "middle")
  .text("Date");

顺便说一句，您的数据未排序。

日期为 JSON 的 D3 v4 折线图

D3 v4 line chart with JSON dates

javascript

json

date

linechart

d3.js