javascript - Highcharts 区域 : x-axis in hours but showing multiple points in each hour

Question

我正在使用this example来自 highcharts，但我需要按如下方式调整:

1. 让 x 轴显示从当前小时开始的当前 24 小时(我能够绘制 24 小时，但不能从当前小时开始绘制)

    xAxis: {
               type: 'datetime',
               tickInterval: 3600 * 1000,
               min: Date.UTC(2013,4,22),
               max: Date.UTC(2013,4,23),
           },
   

2. 显示连续 2 小时之间的多个点

有什么想法吗？

这是 jsfiddle 的完整代码:

$(function () {
$('#container').highcharts({
    chart: {
        type: 'area'
    },
    title: {
        text: 'US and USSR nuclear stockpiles'
    },
    subtitle: {
        text: 'Source: <a href="http://thebulletin.metapress.com/content/c4120650912x74k7/fulltext.pdf">' +
            'thebulletin.metapress.com</a>'
    },
    xAxis: {
        allowDecimals: false,
        labels: {
            formatter: function () {
                return this.value; // clean, unformatted number for year
            }
        }
    },
    yAxis: {
        title: {
            text: 'Nuclear weapon states'
        },
        labels: {
            formatter: function () {
                return this.value / 1000 + 'k';
            }
        }
    },
    tooltip: {
        pointFormat: '{series.name} produced <b>{point.y:,.0f}</b><br/>warheads in {point.x}'
    },
    plotOptions: {
        area: {
            pointStart: 1940,
            marker: {
                enabled: false,
                symbol: 'circle',
                radius: 2,
                states: {
                    hover: {
                        enabled: true
                    }
                }
            }
        }
    },
    series: [{
        name: 'USA',
        data: [null, null, null, null, null, 6, 11, 32, 110, 235, 369, 640,
            1005, 1436, 2063, 3057, 4618, 6444, 9822, 15468, 20434, 24126,
            27387, 29459, 31056, 31982, 32040, 31233, 29224, 27342, 26662,
            26956, 27912, 28999, 28965, 27826, 25579, 25722, 24826, 24605,
            24304, 23464, 23708, 24099, 24357, 24237, 24401, 24344, 23586,
            22380, 21004, 17287, 14747, 13076, 12555, 12144, 11009, 10950,
            10871, 10824, 10577, 10527, 10475, 10421, 10358, 10295, 10104]
    }, {
        name: 'USSR/Russia',
        data: [null, null, null, null, null, null, null, null, null, null,
            5, 25, 50, 120, 150, 200, 426, 660, 869, 1060, 1605, 2471, 3322,
            4238, 5221, 6129, 7089, 8339, 9399, 10538, 11643, 13092, 14478,
            15915, 17385, 19055, 21205, 23044, 25393, 27935, 30062, 32049,
            33952, 35804, 37431, 39197, 45000, 43000, 41000, 39000, 37000,
            35000, 33000, 31000, 29000, 27000, 25000, 24000, 23000, 22000,
            21000, 20000, 19000, 18000, 18000, 17000, 16000]
    }]
});

});

Answer 1

您可以使用一些 JavaScript 并更改 highcharts 全局选项来完成此操作。下面是获取当前时间的代码:

var now = new Date();
var utc_timestamp = now.getTime();
var startTime = utc_timestamp;
var endTime = utc_timestamp + 86400000; // add 24 hours (in millis).

console.log(startTime);
console.log(endTime);

这将返回 UTC 时间。现在要让图表使用用户的本地时间，请设置 useUTC参数为:

Highcharts.setOptions({
    global: {
        useUTC: false
    }
});

所以你的xAxis看起来像:

xAxis: {
  type: 'datetime',
  tickInterval: 3600 * 1000,
  min: startTime,
  max: endTime
},

这是功能性但基本的 demo 。请注意，您还必须更改 plotOptions.series.pointStart 和 .pointInterval。请注意，该系列赛有超过 24 分。