如何设置谷歌图表垂直轴增量?如何在网格栏上设置最大宽度?[副本]

google.charts.load('current', {
  callback: drawChart,
  packages: ['corechart']
});

function drawChart() {
  var data = new google.visualization.DataTable();
  data.addColumn('date','Date');
  data.addColumn('number','Value');
  data.addRows([
    [new Date(2017, 1, 12), 250],
    [new Date(2017, 1, 13), 200],
    [new Date(2017, 1, 14), 150]
  ]);

  var options = {
    hAxis: {
      format: 'yyyy-MM-dd'
    },
    theme: 'material',
    vAxis: {
      format: '$#,##',
      title: 'Amount'
    }
  };

  var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
  chart.draw(data, options);
}

<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>