单轴散点图垂直显示echarts scatter配置项内容和展示

只有散点垂直了，坐标轴等等元素还是横的。

          test_data = [
        ['2014/07/08', 3],
        ['2016/07/13', 5],
        ['2016/07/28', 4],
        ['2016/08/18', 6],
        ['2016/08/28', 3],
        ['2016/09/29', 2],
        ['2016/11/02', 8],
        ['2017/03/04', 8],
        ['2018/02/04', 6]
    ];

    option = {
        tooltip: {
            position: 'top'
        },
        title: [
            {
                left: 'center',
                text: 'TimeLine'
            }
        ],
        singleAxis: [
            {
                top: 50,
                type: 'time',
                boundaryGap: false,
                orient: 'vertical',
//                maxInterval: 3600 * 24 * 1000 * 365
                axisLine: {
                    symbol: ['none', 'arrow']
                }
            }
        ],
        series: [
            {
                coordinateSystem: 'singleAxis',
                type: 'scatter',
                data: test_data,
                symbolSize: function (dataItem) {
                    return dataItem[1] * 4;
                }
            }
        ]
    };