Following is an example of a basic line chart with smooth curved lines. We’ve already seen the configuration used to draw this chart in the Google Charts Configuration Syntax chapter. So, let’s see the complete example.
Configurations
We’ve added backgroundColor configuration to change the default background color.
// Set chart options
var options = {
curveType: 'function'
};
Example
googlecharts_line_curve.htm
<html>
<head>
<title>Google Charts </title>
<script type = "text/javascript" src = "https://www.gstatic.com/charts/loader.js"></script>
<script type = "text/javascript">
google.charts.load('current', {packages: ['corechart','line']});
</script>
</head>
<body>
<div id = "container" style = "width: 550px; height: 400px; margin: 0 auto">
</div>
<script language = "JavaScript">
function drawChart() {
// Define the chart to be drawn.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('number', 'Tokyo');
data.addColumn('number', 'New York');
data.addColumn('number', 'Berlin');
data.addColumn('number', 'London');
data.addRows([
['Jan', 7.0, -0.2, -0.9, 3.9],
['Feb', 6.9, 0.8, 0.6, 4.2],
['Mar', 9.5, 5.7, 3.5, 5.7],
['Apr', 14.5, 11.3, 8.4, 8.5],
['May', 18.2, 17.0, 13.5, 11.9],
['Jun', 21.5, 22.0, 17.0, 15.2],
['Jul', 25.2, 24.8, 18.6, 17.0],
['Aug', 26.5, 24.1, 17.9, 16.6],
['Sep', 23.3, 20.1, 14.3, 14.2],
['Oct', 18.3, 14.1, 9.0, 10.3],
['Nov', 13.9, 8.6, 3.9, 6.6],
['Dec', 9.6, 2.5, 1.0, 4.8]
]);
// Set chart options
var options = {'title' : 'Average Temperatures of Cities',
hAxis: {
title: 'Month'
},
vAxis: {
title: 'Temperature'
},
'width':550,
'height':400,
curveType: 'function'
};
// Instantiate and draw the chart.
var chart = new google.visualization.LineChart(document.getElementById('container'));
chart.draw(data, options);
}
google.charts.setOnLoadCallback(drawChart);
</script>
</body>
</html>
Result
Verify the result.
