如何让月份在 morris.js 图表中正确显示？

Question

我无法在 morris.js 图表中正确显示月份。

<script>

var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

Morris.Line({
  element: 'morris-line-chart',
  data: [
          { m: '01', a: 0, b: 270 },
          { m: '02', a: 54, b: 256 },
          { m: '03', a: 243, b: 334 },
          { m: '04', a: 206, b: 282 },
          { m: '05', a: 161, b: 58 },
          { m: '06', a: 187, b: 0 },
          { m: '07', a: 210, b: 0 },
          { m: '08', a: 204, b: 0 },
          { m: '09', a: 224, b: 0 },
          { m: '10', a: 301, b: 0 },
          { m: '11', a: 262, b: 0 },
          { m: '12', a: 199, b: 0 },
        ],
  xkey: 'm',
  ykeys: ['a', 'b'],
  labels: ['2014', '2015'],
  xLabelFormat: function (x) { return months[x.getMonth()]; }
});
</script>

但图表上的所有月份都显示为 'Jan' ...

Answer 1

如果你look at the documentation，需要 xkey选项定义如下：

A string containing the name of the attribute that contains date (X) values. Timestamps are accepted in the form of millisecond timestamps (as returned by Date.getTime() or as strings in the following formats:

2012

2012 Q1

2012 W1

2012-02

2012-02-24

2012-02-24 15:00

2012-02-24 15:00:00

2012-02-24 15:00:00.000

目前，在您的数据中，您只提供一个代表月份的整数（即 01、02、03 等）

因此，如果您将月份数据更改为有效的时间戳字符串，根据文档，您应该有一个有效的方法来将返回的 "month" 值的索引映射到您的 months 标签数组...

示例：

var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];

Morris.Line({
  element: 'morris-line-chart',
  data: [{
    m: '2015-01', // <-- valid timestamp strings
    a: 0,
    b: 270
  }, {
    m: '2015-02',
    a: 54,
    b: 256
  }, {
    m: '2015-03',
    a: 243,
    b: 334
  }, {
    m: '2015-04',
    a: 206,
    b: 282
  }, {
    m: '2015-05',
    a: 161,
    b: 58
  }, {
    m: '2015-06',
    a: 187,
    b: 0
  }, {
    m: '2015-07',
    a: 210,
    b: 0
  }, {
    m: '2015-08',
    a: 204,
    b: 0
  }, {
    m: '2015-09',
    a: 224,
    b: 0
  }, {
    m: '2015-10',
    a: 301,
    b: 0
  }, {
    m: '2015-11',
    a: 262,
    b: 0
  }, {
    m: '2015-12',
    a: 199,
    b: 0
  }, ],
  xkey: 'm',
  ykeys: ['a', 'b'],
  labels: ['2014', '2015'],
  xLabelFormat: function(x) { // <--- x.getMonth() returns valid index
    var month = months[x.getMonth()];
    return month;
  },
  dateFormat: function(x) {
    var month = months[new Date(x).getMonth()];
    return month;
  },
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="http://cdn.oesmith.co.uk/morris-0.4.3.min.css" rel="stylesheet" />
<script src="http://cdn.oesmith.co.uk/morris-0.5.0.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>

<div id="morris-line-chart" style="height: 250px;"></div>

编辑

可以通过包含 morris 版本 0.5.1（而不是 0.5.0 - 根据 github page about this issue - 我没有在其他版本中测试过）并稍微改变xLabelFormat 选项（function(x){...} 中的 x 显然是条形图与折线图的不同对象）：

条形图示例：

// months array and data are left the same
// only change is that the labelFormat option is removed
// and, x in xLabelFormat is a different object with Bar charts vs Line

// [inspect console to see the object]

var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];

Morris.Bar({
    element: 'morris-bar-chart',
    data: [{
        m: '2015-01',
        a: 0,
        b: 270
    }, {
        m: '2015-02',
        a: 54,
        b: 256
    }, {
        m: '2015-03',
        a: 243,
        b: 334
    }, {
        m: '2015-04',
        a: 206,
        b: 282
    }, {
        m: '2015-05',
        a: 161,
        b: 58
    }, {
        m: '2015-06',
        a: 187,
        b: 0
    }, {
        m: '2015-07',
        a: 210,
        b: 0
    }, {
        m: '2015-08',
        a: 204,
        b: 0
    }, {
        m: '2015-09',
        a: 224,
        b: 0
    }, {
        m: '2015-10',
        a: 301,
        b: 0
    }, {
        m: '2015-11',
        a: 262,
        b: 0
    }, {
        m: '2015-12',
        a: 199,
        b: 0
    }, ],
    xkey: 'm',
    ykeys: ['a', 'b'],
    labels: ['2014', '2015'],
    xLabelFormat: function (x) { // <-- changed
        console.log("this is the new object:" + x);
        var month = months[x.x];
        return month;
    },
});

<link href="http://cdn.oesmith.co.uk/morris-0.4.3.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.oesmith.co.uk/morris-0.5.1.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>


<div id="morris-bar-chart" style="height: 250px;"></div>

如何让月份在 morris.js 图表中正确显示？

How to get months to show correctly in a morris.js chart?

javascript

jquery

morris.js