我使用谷歌折线图我想画一条基线,但我不知道该怎么办呢,例如我想在2004年400到600之间画线,我该怎么办呢 谷歌示例:
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Year', 'Sales', 'Expenses'],
['2004', 1000, 400],
['2005', 1170, 460],
['2006', 660, 1120],
['2007', 1030, 540]
]);
var options = {
title: 'Company Performance'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
</body>
</html>
答案 0 :(得分:0)
您可以通过几种不同的方式执行此操作,具体取决于您要实现的目标。最简单的方法是使用&#34; interval&#34;角色列:
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Year', 'Sales', 'Expenses', {role: 'interval', type: 'number'}, {role: 'interval', type: 'number'}],
['2004', 1000, 400, 400, 600],
['2005', 1170, 460, null, null],
['2006', 660, 1120, null, null],
['2007', 1030, 540, null, null]
]);
var options = {
title: 'Company Performance'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
您可以使用间隔进行相当多的自定义,请参阅documentation。
另一种方法是为此行添加一系列新数据,从&#34; string&#34;更改第一列的数据类型。 to&#34; number&#34;,并添加具有相同x值的多行数据,例如:
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Year', 'Sales', 'Expenses', 'vertical lines'],
[2004, 1000, 400, 400],
[2004, null, null, 600],
[2005, 1170, 460, null],
[2006, 660, 1120, null],
[2007, 1030, 540, null]
]);
var options = {
title: 'Company Performance',
interpolateNulls: true, // this prevents your other lines from breaking
series: {
2: {
// these options control your new series for the vertical lines
visibleInLegend: false, // hide from the legend
enableInteractivity: false // make the line non-interactive
color: '#9055a6' // set the color of the line
// etc...
}
}
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}