Google Choice: Highcharts - Configuration Syntax

Tuesday, February 21, 2017

Highcharts - Configuration Syntax

In this chapter we'll showcase the comfiguration required to draw a chart using Highcharts API.

Step 1: Create HTML Page

Create an HTML page with the jQuery and highchart javascript libraries.
HighchartsTestHarness.htm

<html>
<head>
<title>Highcharts Tutorial</title>
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
   <script src="https://code.highcharts.com/highcharts.js"></script>
</head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
     
});
</script>
</body>
</html>

Here container div is used to contain the chart drawn using Highcharts library.

Step 2: Create configurations

Highcharts library uses very simple configurations using json syntax.

$('#container').highcharts(json);

Here json represents the json data and configuration which HighChart library uses to draw a chart withing container div using highcharts() method. Now we'll configure the various parameter to create the required json string.

title

Configure the title of the chart.

var title = {
  text: 'Monthly Average Temperature'   
};

subtitle

Configure the subtitle of the chart.

var subtitle = {
  text: 'Source: WorldClimate.com'
};

xAxis

Configure the ticker to be displayed on X-Axis.

var xAxis = {
   categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'
      ,'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
};

yAxis

Configure the title, plot lines to be displayed on Y-Axis.

var yAxis = {
   title: {
      text: 'Temperature (\xB0C)'
   },
   plotLines: [{
      value: 0,
      width: 1,
      color: '#808080'
   }]
};

tooltip

Configure the tooltip. Put suffix to be added after value (y-axis).

var tooltip = {
   valueSuffix: '\xB0C'
}

legend

Configure the legend to be displayed on the right side of the chart along with other properties.

var legend = {
   layout: 'vertical',
   align: 'right',
   verticalAlign: 'middle',
   borderWidth: 0
};

series

Configure the data to be displayed on the chart. Series is an array where each element of this array represents a single line on the chart.

var series =  [
   {
      name: 'Tokyo',
      data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 
         26.5, 23.3, 18.3, 13.9, 9.6]
   }, 
   {
      name: 'New York',
      data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8, 
         24.1, 20.1, 14.1, 8.6, 2.5]
   }, 
   {
      name: 'Berlin',
      data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6, 
         17.9, 14.3, 9.0, 3.9, 1.0]
   }, 
   {
      name: 'London',
      data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 
         16.6, 14.2, 10.3, 6.6, 4.8]
   }
];

Step 3: Build the json data

Combine all the configurations.

var json = {};

json.title = title;
json.subtitle = subtitle;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.tooltip = tooltip;
json.legend = legend;
json.series = series;

Step 4: Draw the chart

$('#container').highcharts(json);

Example

Following is the complete example:
highcharts_configuration.htm

<html>
<head>
<title>Highcharts Tutorial</title>
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
   <script src="https://code.highcharts.com/highcharts.js"></script> 
</head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
   var title = {
      text: 'Monthly Average Temperature'   
   };
   var subtitle = {
      text: 'Source: WorldClimate.com'
   };
   var xAxis = {
      categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
         'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
   };
   var yAxis = {
      title: {
         text: 'Temperature (\xB0C)'
      },
      plotLines: [{
         value: 0,
         width: 1,
         color: '#808080'
      }]
   };   

   var tooltip = {
      valueSuffix: '\xB0C'
   }

   var legend = {
      layout: 'vertical',
      align: 'right',
      verticalAlign: 'middle',
      borderWidth: 0
   };

   var series =  [
      {
         name: 'Tokyo',
         data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,
            26.5, 23.3, 18.3, 13.9, 9.6]
      }, 
      {
         name: 'New York',
         data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,
            24.1, 20.1, 14.1, 8.6, 2.5]
      }, 
      {
         name: 'Berlin',
         data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6,
            17.9, 14.3, 9.0, 3.9, 1.0]
      }, 
      {
         name: 'London',
         data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 
            16.6, 14.2, 10.3, 6.6, 4.8]
      }
   ];

   var json = {};

   json.title = title;
   json.subtitle = subtitle;
   json.xAxis = xAxis;
   json.yAxis = yAxis;
   json.tooltip = tooltip;
   json.legend = legend;
   json.series = series;

   $('#container').highcharts(json);
});
</script>
</body>
</html>

Result

Verify the result.

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