highcharts，双y轴数据对应问题，series设置yAxis属性

function chat1() {
    $('#container1').highcharts({
        credits: {
            enabled: false
        },
        title: {
            text: '大标题'
        },
        subtitle: {
            text: '小标题'
        },
        xAxis: {
            categories: categories,
            crosshair: true
        },
        yAxis: [{ // 第一条Y轴
            labels: {
                format: '{value} 元',
                style: {
                    color: Highcharts.getOptions().colors[1]
                }
            },
            title: {
                text: '金额(元)',
                style: {
                    color: Highcharts.getOptions().colors[1]
                }
            },
            opposite: true
        }, { // 第二条Y轴
            labels: {
                format: '{value} 位',
                style: {
                    color: Highcharts.getOptions().colors[0]
                }
            },
            title: {
                text: '人数(位)',
                style: {
                    color: Highcharts.getOptions().colors[0]
                }
            }
        }],
        series: [{
            type: 'column',
            name: '金额1',
            data: []
        }, {
            type: 'column',
            name: '金额2',
            data: []
        }, {
            type: 'spline',
            name: '人数1',
            yAxis: 1,
            data: []
        }, {
            type: 'spline',
            yAxis: 1,
            name: '人数2',
            data: []
        }],
        tooltip: {
            shared: true,
            pointFormatter: function () {
                var html = this.series.name + ': ' + this.y.toFixed(2) + '<br/>';
                return html;
            }
        }
    });
}