请问Highcharts如何给双y轴设置title?

Question

chart.yAxis[0].setTitle({
            text: 'New Y axis title'
        });

我这样设置会报错：aught TypeError: Cannot read property '0' of undefined
谢谢！

Answer 1

var chart = $('#container_connect').highcharts({
},function(c){
c.yAxis[0].setTitle({
                  text: labelText[0]
                });
                c.yAxis[1].setTitle({
                  text: labelText[1]
                });
})