javascript - Highcharts Xaxis 删除旧数据并左移

Question

我对任何类型的编程语言都很陌生，但我非常幸运地找到了开始我正在从事的项目所需的东西。我正在尝试使用 Highcharts 从 SQL 数据库为最终用户直观地生成数据。我需要将我的 xAxis 标记长达一年（2018 年 1 月 - 2019 年 1 月、2018 年 2 月 - 2019 年 2 月等），以便在每月有新的每月数据时向左移动并“隐藏”或“裁剪”图表中的旧数据被输入到 SQL 中。

Highcharts.chart('container', {
  chart: {
    type: 'column'
  },
  title: {
    text: 'Monthly Average Rainfall'
  },
  subtitle: {
    text: 'Source: WorldClimate.com'
  },
  xAxis: {
    categories: [
      'Jan 2018',
      'Feb',
      'Mar',
      'Apr',
      'May',
      'Jun',
      'Jul',
      'Aug',
      'Sep',
      'Oct',
      'Nov',
      'Dec',
      'Jan 2019'
    ],
    crosshair: true
  },
  yAxis: {
    min: 0,
    title: {
      text: 'Rainfall (mm)'
    }
  },
  tooltip: {
    headerFormat: '<span style="font-size:10px">{point.key}</span><table>',
    pointFormat: '<tr><td style="color:{series.color};padding:0">{series.name}: </td>' +
      '<td style="padding:0"><b>{point.y:.1f} mm</b></td></tr>',
    footerFormat: '</table>',
    shared: true,
    useHTML: true
  },
  plotOptions: {
    column: {
      pointPadding: 0.2,
      borderWidth: 0
    }
  },
  series: [{
    name: 'Tokyo',
    data: [49.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4, 90]

  }, {
    name: 'New York',
    data: [83.6, 78.8, 98.5, 93.4, 106.0, 84.5, 105.0, 104.3, 91.2, 83.5, 106.6, 92.3, 90]

  }, {
    name: 'London',
    data: [48.9, 38.8, 39.3, 41.4, 47.0, 48.3, 59.0, 59.6, 52.4, 65.2, 59.3, 51.2, 90]

  }, {
    name: 'Berlin',
    data: [42.4, 33.2, 34.5, 39.7, 52.6, 75.5, 57.4, 60.4, 47.6, 39.1, 46.8, 51.1, 90]

  }]
});

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>

<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>

所以目前我看起来像上面那样，当添加 2019 年 2 月时，它应该将 2018 年 1 月从图表中移出，第一组数据应该是 2018 年 2 月到 2019 年 2 月。

Highcharts.chart('container', {
    chart: {
        type: 'column'
    },
    title: {
        text: 'Monthly Average Rainfall'
    },
    subtitle: {
        text: 'Source: WorldClimate.com'
    },
    xAxis: {
        categories: [        
            'Feb 2018',
            'Mar',
            'Apr',
            'May',
            'Jun',
            'Jul',
            'Aug',
            'Sep',
            'Oct',
            'Nov',
            'Dec',
            'Jan',
            'February 2019'
        ],
        crosshair: true
    },
    yAxis: {
        min: 0,
        title: {
            text: 'Rainfall (mm)'
        }
    },
    tooltip: {
        headerFormat: '<span style="font-size:10px">{point.key}</span><table>',
        pointFormat: '<tr><td style="color:{series.color};padding:0">{series.name}: </td>' +
            '<td style="padding:0"><b>{point.y:.1f} mm</b></td></tr>',
        footerFormat: '</table>',
        shared: true,
        useHTML: true
    },
    plotOptions: {
        column: {
            pointPadding: 0.2,
            borderWidth: 0
        }
    },
    series: [{
        name: 'Tokyo',
        data: [49.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4, 90]

    }, {
        name: 'New York',
        data: [83.6, 78.8, 98.5, 93.4, 106.0, 84.5, 105.0, 104.3, 91.2, 83.5, 106.6, 92.3 , 90]

    }, {
        name: 'London',
        data: [48.9, 38.8, 39.3, 41.4, 47.0, 48.3, 59.0, 59.6, 52.4, 65.2, 59.3, 51.2, 90]

    }, {
        name: 'Berlin',
        data: [42.4, 33.2, 34.5, 39.7, 52.6, 75.5, 57.4, 60.4, 47.6, 39.1, 46.8, 51.1, 90]

    }]
});

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>

<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>

手动编辑月份进出是我目前正在做的事情 - 类似于上面的示例，如果可以自动将其向左移动会很好。提前致谢！

标签： javascriptjqueryhtmlhighcharts

Answer 1

您可以使用带有月份名称的数组作为点名称。该数组应在每次获取数据后更改其顺序。

var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec', 'Jan'],
  year = 2018;

// Create the chart
Highcharts.chart('container', {
  chart: {
    events: {
      load: function() {

        // set up the updating of the chart each second
        var series = this.series[0],
          xAxis = this.xAxis[0];

        setInterval(function() {
          months.splice(0, 1);
          months.push(months[0]);

          var name = months[months.length - 1];

          if (months[months.length - 1] == 'Jan') {
            year++;
            name = months[months.length - 1] + " " + year;
          }

          var y = Math.round(Math.random() * 100);
          series.addPoint({
            y: y,
            name: name
          }, true, true, false);

        }, 1000);
      }
    }
  },

  xAxis: {
    uniqueNames: false,
    type: "category"
  },

  series: [{
    name: 'Random data',
    data: (function() {
      // generate an array of random data
      var data = [],
        i;

      for (i = 0; i <= 12; i++) {
        if (i == 0) {
          name = months[i] + " " + year
        } else if (i == 12) {
          year++;
          name = months[i] + " " + year
        } else {
          name = months[i]
        }
        data.push({
          y: Math.round(Math.random() * 100),
          name: name
        });
      }
      return data;
    }())
  }]
});

API参考：

https://api.highcharts.com/highcharts/series.line.data.name

https://api.highcharts.com/highcharts/xAxis.uniqueNames

https://api.highcharts.com/class-reference/Highcharts.Series#addPoint

现场示例：https ://jsfiddle.net/BlackLabel/2ur6fyn4/