如何使用 highcharts 3D 散点图获取立方图？

Question

我正在寻找使用 JavaScript 显示 3D 散点图的工具，发现 Highcharts' 3D scatter chart 看起来不错。

唯一的问题是我希望图表具有立方体形式，因为所有轴都是从 0 到 10。现在 X 轴是其他轴的两倍，我找不到改变的方法这个。

Here is Highcharts fiddle for the 3d scatter chart

$(function () {

    // Give the points a 3D feel by adding a radial gradient
    Highcharts.getOptions().colors = $.map(Highcharts.getOptions().colors, function (color) {
        return {
            radialGradient: {
                cx: 0.4,
                cy: 0.3,
                r: 0.5
            },
            stops: [
                [0, color],
                [1, Highcharts.Color(color).brighten(-0.2).get('rgb')]
            ]
        };
    });

    // Set up the chart
    var chart = new Highcharts.Chart({
        chart: {
            renderTo: 'container',
            margin: 100,
            type: 'scatter',
            options3d: {
                enabled: true,
                alpha: 10,
                beta: 30,
                depth: 250,
                viewDistance: 5,

                frame: {
                    bottom: { size: 1, color: 'rgba(0,0,0,0.02)' },
                    back: { size: 1, color: 'rgba(0,0,0,0.04)' },
                    side: { size: 1, color: 'rgba(0,0,0,0.06)' }
                }
            }
        },
        title: {
            text: 'Draggable box'
        },
        subtitle: {
            text: 'Click and drag the plot area to rotate in space'
        },
        plotOptions: {
            scatter: {
                width: 10,
                height: 10,
                depth: 10
            }
        },
        yAxis: {
            min: 0,
            max: 10,
            title: null
        },
        xAxis: {
            min: 0,
            max: 10,
            gridLineWidth: 1
        },
        zAxis: {
            min: 0,
            max: 10
        },
        legend: {
            enabled: false
        },
        series: [{
            name: 'Reading',
            colorByPoint: true,
            data: [[1, 6, 5], [8, 7, 9], [1, 3, 4], [4, 6, 8], [5, 7, 7], [6, 9, 6], [7, 0, 5], [2, 3, 3], [3, 9, 8], [3, 6, 5], [4, 9, 4], [2, 3, 3], [6, 9, 9], [0, 7, 0], [7, 7, 9], [7, 2, 9], [0, 6, 2], [4, 6, 7], [3, 7, 7], [0, 1, 7], [2, 8, 6], [2, 3, 7], [6, 4, 8], [3, 5, 9], [7, 9, 5], [3, 1, 7], [4, 4, 2], [3, 6, 2], [3, 1, 6], [6, 8, 5], [6, 6, 7], [4, 1, 1], [7, 2, 7], [7, 7, 0], [8, 8, 9], [9, 4, 1], [8, 3, 4], [9, 8, 9], [3, 5, 3], [0, 2, 4], [6, 0, 2], [2, 1, 3], [5, 8, 9], [2, 1, 1], [9, 7, 6], [3, 0, 2], [9, 9, 0], [3, 4, 8], [2, 6, 1], [8, 9, 2], [7, 6, 5], [6, 3, 1], [9, 3, 1], [8, 9, 3], [9, 1, 0], [3, 8, 7], [8, 0, 0], [4, 9, 7], [8, 6, 2], [4, 3, 0], [2, 3, 5], [9, 1, 4], [1, 1, 4], [6, 0, 2], [6, 1, 6], [3, 8, 8], [8, 8, 7], [5, 5, 0], [3, 9, 6], [5, 4, 3], [6, 8, 3], [0, 1, 5], [6, 7, 3], [8, 3, 2], [3, 8, 3], [2, 1, 6], [4, 6, 7], [8, 9, 9], [5, 4, 2], [6, 1, 3], [6, 9, 5], [4, 8, 2], [9, 7, 4], [5, 4, 2], [9, 6, 1], [2, 7, 3], [4, 5, 4], [6, 8, 1], [3, 4, 0], [2, 2, 6], [5, 1, 2], [9, 9, 7], [6, 9, 9], [8, 4, 3], [4, 1, 7], [6, 2, 5], [0, 4, 9], [3, 5, 9], [6, 9, 1], [1, 9, 2]]
        }]
    });


    // Add mouse events for rotation
    $(chart.container).bind('mousedown.hc touchstart.hc', function (e) {
        e = chart.pointer.normalize(e);

        var posX = e.pageX,
            posY = e.pageY,
            alpha = chart.options.chart.options3d.alpha,
            beta = chart.options.chart.options3d.beta,
            newAlpha,
            newBeta,
            sensitivity = 5; // lower is more sensitive

        $(document).bind({
            'mousemove.hc touchdrag.hc': function (e) {
                // Run beta
                newBeta = beta + (posX - e.pageX) / sensitivity;
                newBeta = Math.min(100, Math.max(-100, newBeta));
                chart.options.chart.options3d.beta = newBeta;

                // Run alpha
                newAlpha = alpha + (e.pageY - posY) / sensitivity;
                newAlpha = Math.min(100, Math.max(-100, newAlpha));
                chart.options.chart.options3d.alpha = newAlpha;

                chart.redraw(false);
            },
            'mouseup touchend': function () {
                $(document).unbind('.hc');
            }
        });
    });

});

有人知道如何解决这个问题吗？

Answer 1

最简单的方法是使用标签格式化程序，然后检查标签是否为第一个。如果是，则不打印值。

xAxis: {
        min: 0,
        max: 10,
        gridLineWidth: 1,
        labels:{
            formatter:function(){
                if(!this.isFirst)
                    return this.value;
            }
        }
    },

示例：http://jsfiddle.net/qk9pftjv/

Answer 2

这里有两种方法，我认为这两种方法都不理想，但鉴于您的图表在外观（宽度和高度）上有些静态，因此可以完成工作。

设置边距以使绘图区域反映轴的尺寸。在你的例子中，x 和 y 为 1:1。这有一些缺点，除了相当静态和奇怪的设置。另请注意，您必须限制最小宽度，否则当浏览器宽度较小时看起来会很奇怪。使用分散示例，它可能看起来像这样 (JSFiddle):
```
var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        margin: 100,
        marginLeft: 300,
        marginRight: 300,
        // ...
    }
    // ...
});
```

设置轴的宽度和高度。这种方法的问题在于图表将围绕不存在的 "middle point" 旋转，并且它将被放置在绘图的左侧而无需进一步修改。再次使用散点图，它可能看起来像这样 (JSFiddle):

var chart = new Highcharts.Chart({
    yAxis: {
        min: 0,
        max: 10,
        width: 200,
        height: 200,
        // ...
    },
    xAxis: {
        min: 0,
        max: 10,
        width: 200,
        height: 200,
        // ...
    },
    zAxis: {
        min: 0,
        max: 10,
        width: 200,
        height: 200,
        // ...
    }
    // ...
});

如何使用 highcharts 3D 散点图获取立方图？

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