javascript - 减少 Highcharts 中点之间的距离

Question

我正在尝试减少图表上数据点之间的距离，下面的代码来自 highcharts 示例

$(function () {
$(document).ready(function() {
    Highcharts.setOptions({
        global: {
            useUTC: false
        }
    });

    var chart;
    $('#container').highcharts({
        chart: {
            type: 'spline',
            animation: Highcharts.svg, // don't animate in old IE
            marginRight: 5,
            events: {
                load: function() {

                    // set up the updating of the chart each second
                    var series = this.series[0];
                    setInterval(function() {
                        var x = (new Date()).getTime(), // current time
                            y = Math.random();
                        series.addPoint([x, y], true, true);
                    }, 1000);
                }
            }
        },
        title: {
            text: 'Live random data'
        },
        xAxis: {
            type: 'datetime',
            tickPixelInterval: 50 // here i wanted to decerease bu it does not work
        },
        yAxis: {
            title: {
                text: 'Value'
            },
            plotLines: [{
                value: 0,
                width: 0.1,
                color: '#808080'
            }]
        },
        tooltip: {
            formatter: function() {
                    return '<b>'+ this.series.name +'</b><br/>'+
                    Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) +'<br/>'+
                    Highcharts.numberFormat(this.y, 2);
            }
        },
        legend: {
            enabled: false
        },
        exporting: {
            enabled: false
        },
        series: [{ // series with random data
            name: 'Random data', // may be here 
            data: (function() {
                // generate an array of random data
                var data = [],
                    time = (new Date()).getTime(),
                    i;

                for (i = -19; i <= 0; i++) {
                    data.push({
                        x: time + i * 1000,
                        y: Math.random()
                    });
                }
                return data;
            })()
        }]
    });
});

  });

http://jsfiddle.net/V9BV4/

可以制作吗？我需要缩小 xAxis 或减小线上点之间的距离

Answer 1

为了执行您所要求的操作，您可能需要考虑:

1) 缩小图表，使各个点靠得更近(参见 http://jsfiddle.net/brightmatrix/Gq9X9/ ):

chart: {
    vtype: 'spline',
    width: 300,     /* make this value anything you want */
    animation: Highcharts.svg, // don't animate in old IE
    marginRight: 5,
    ...

这与上面提供的@falconw 的建议类似。

2) 在这个特定的实时示例中，更改数据的计算方式，以便每次更新图表时推出更多点(请参阅 http://jsfiddle.net/brightmatrix/Fp5K4/ ):

series: [{
    name: 'Random data',
    data: (function() {
        // generate an array of random data
            var data = [],
            time = (new Date()).getTime(),
            i;
            for (i = -19; i <= 0; i++) {
                data.push({
                    /* made the multiplier larger so points are closer together */
                    x: time + i * 10000,    
                    y: Math.random()
                });
            }
        return data;
    })()
}] 

底线，要么更改图表尺寸，要么使数据“更密集”，使点更加靠近。我希望这会有所帮助。