如何在morris.js中设置步骤？

Question

我在Morris.js上有一个简单的图形：

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如何在Y位置设置步长？步长必须为50分，e.q：

..。

150

100

50

    $(document).ready(function() {
            new Morris.Line({
                element: 'myfirstchart',
                data: [
                {year: '2011-10-01' },
                {year: '2012', mark: 313.75},{year: '2013', mark: 323.75},
                {year: '2016-06-01' }
                ],
                xkey: ['year'],
                ykeys: ['mark'],
                xLabels: 'year',
                hideHover: true,
                labels: ['Mark'],
                ymax : 350, ymin : 0,
                events: ['2012','2013','2014','2015','2016'],
                eventLineColors: ['#aaaaaa']
            });
    });

Answer 1

我认为唯一可以做到这一点的方法是根据ymin和ymax设置网格的行数(numLines)。

<script type="text/javascript">
$(document).ready(function() {
        new Morris.Line({
            element: 'myfirstchart',
            data: [
            {year: '2011-10-01' },
            {year: '2012', mark: 313.75},{year: '2013', mark: 323.75},
            {year: '2016-06-01' }
            ],
            xkey: ['year'],
            ykeys: ['mark'],
            xLabels: 'year',
            hideHover: true,
            labels: ['Mark'],
            ymax : 350, ymin : 0,
            numLines: 8,
            events: ['2012','2013','2014','2015','2016'],
            eventLineColors: ['#aaaaaa']
        });
});
</script>