如何在离子框架中设置图表中的X轴和Y轴标题？

Question

这是我用过的代码

                             

用于插入图表 这是我用过的控制器

.controller('ExampleCtrl', function ($scope) {

    $scope.labels = ["January", "February", "March", "April", "May", "June", "July"];
    $scope.data = [
        [65, 59, 80, 81, 56, 55, 40],
        [28, 48, 40, 19, 86, 27, 90]
    ];
})

有人请帮我解决这个问题.. !!!