dc.js 折线图聚合 Month/Year

Question

我试图绘制一个折线图，我想按月汇总数据。我正在使用来自 crossfilter documentation 的数据集，日期略有修改。

这是我的数据集的样子：

var data = [
  {date: "2011-11-14T16:17:54Z", quantity: 2, total: 190, tip: 100, type: "tab"},
  {date: "2011-07-10T16:28:54Z", quantity: 1, total: 300, tip: 200, type: "visa"},
  {date: "2011-07-15T16:28:54Z", quantity: 1, total: 300, tip: 200, type: "visa"},
  {date: "2011-06-14T16:30:43Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-06-14T16:48:46Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-05-14T16:53:41Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-07-17T16:14:06Z", quantity: 1, total: 100, tip: 0, type: "cash"},
  {date: "2011-05-14T16:58:03Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-12-14T17:07:21Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-11-14T17:22:59Z", quantity: 2, total: 90, tip: 0, type: "tab"},
  {date: "2011-11-14T17:25:45Z", quantity: 2, total: 200, tip: 0, type: "cash"},
  {date: "2011-11-14T17:29:52Z", quantity: 1, total: 200, tip: 100, type: "visa"}
];

我想按月-年对总数进行分组。我的数据组根据日期而不是月份返回总数。

在我的图表中，7 月 10 日、15 日和 17 日被绘制为不同的点。我想将它们全部合并到 July-2017 点中。我该如何实现？任何指针？谢谢大家！

这是一个 fiddle： https://jsfiddle.net/usingh2buffaloedu/8u0etnwd/

Answer 1

我在 dc.js 中遇到时间渲染问题，但在您的示例中，关键是获取维度中的月份值。

var dateDimension = facts.dimension(function (d) {return d3.time.month(d.newDate); });

查看更新后的 fiddle (https://jsfiddle.net/ury1k1bs/1/)

我觉得.round()图表方法只对刷图有用，对渲染没有用

有关更多信息，请参阅 dc.js 提供的时间间隔示例... http://dc-js.github.io/dc.js/examples/switching-time-intervals.html

dc.js 折线图聚合 Month/Year

dc.js LineChart Aggregated by Month/Year

javascript

d3.js

crossfilter

dc.js