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Create a Gauge using FusionCharts

FusionCharts Suite XT — the industry's most comprehensive JavaScript charting solution — is all about easing the whole process of data visualization through charts.

In this page, we'll see how to install FusionCharts library and all the other dependencies on your system and render a gauge using Plain JavaScript.

Installation

Install FusionCharts using any of the following steps:

To install the fusioncharts package via npm run the command below:

    $ npm install fusioncharts
To install the FusionCharts Suite follow the steps below:
  1. Include the FusionCharts JavaScript files from CDN.
  2. Include the theme file.
The code is shown below:

<head>
    <!-- Step 1 - Including the fusioncharts core library -->
    <script type="text/javascript" src="http://cdn.fusioncharts.com/fusioncharts/latest/fusioncharts.js"></script>
    <!-- Step 2 - Including the fusion theme -->
    <script type="text/javascript" src="http://cdn.fusioncharts.com/fusioncharts/latest/fusioncharts.theme.fusion.js"></script>
</head>
To install the FusionCharts Suite follow the steps below:
  1. Include the FusionCharts JavaScript files, which can be downloaded from here.
  2. Include the FusionCharts theme file to apply style to the charts.
The code is shown below:

<head>
    <!-- Step 1 - Including the fusioncharts core library -->
    <script type="text/javascript" src="path/to/local/fusioncharts.js"></script>
    <!-- Step 2 - Including the fusion theme -->
    <script type="text/javascript" src="path/to/local/themes/fusioncharts.theme.fusion.js"></script>
</head>

That completes the installation of FusionCharts Suite.

Create your first gauge

Gauges are powerful tools that can showcase information using a radial or linear scale to display data.

To start with, we'll build a simple angular gauge showcasing Nordstorm's Customer Satisfaction Score as shown below.

FusionCharts Suite has 95+ chart types for you to explore. Find the complete list of chart types here.

The angular gauge is shown below:

FusionCharts will load here..

The thresholds for the above sample have been defined using the following range:

Range Color Hex Code
0-50 Red #F2726F
50-75 Yellow #FFC533
75-100 Green #62B58F

So, any score less than 50 is bad and is red. Any score between 50 and 75 is average and is yellow. Any score above 75 means good and are green.

Convert tabular data into JSON format

Now that you have the tabular data ready, it's time to convert it into JSON format, as FusionCharts accepts data in JSON or XML format. In this example, we will use the JSON format, as shown below:

{
    // Chart Configuration
    "chart": {
        "caption": "Nordstorm's Customer Satisfaction Score for 2017",
        "lowerLimit": "0",
        "upperLimit": "100",
        "showValue": "1",
        "numberSuffix": "%",
        "theme": "fusion",
        "showToolTip": "0"
    },
    // Chart Data
    "colorRange": {
        "color": [{
            "minValue": "0",
            "maxValue": "50",
            "code": "#F2726F"
        }, {
            "minValue": "50",
            "maxValue": "75",
            "code": "#FFC533"
        }, {
            "minValue": "75",
            "maxValue": "100",
            "code": "#62B58F"
        }]
    },
    "dials": {
        "dial": [{
            "value": "81"
        }]
    }
}

In the above JSON:

  • Create the chart object to define the elements of the gauge.

  • Create the colorRange array to set the color associated with the specific range of values.

  • Specify minValue and maxValue within the color array under the colorRange array.

  • Specify the hex code of the color within the color array.

  • Create the dials object to represent the customer satisfaction score.

  • Create the dial object under dials object to set the value of the dial in an array.

The chart object and the respective arrays contain a set of key-value pairs known as attributes. These attributes are used to set the functional and cosmetic properties of the gauge.

Now that you have converted the tabular data to JSON format, let's learn how to render the gauge.

Render the gauge

To render the gauge, follow the steps below:

  1. Include the fusioncharts library.

  2. Include the gauge type.

  3. Include the FusionCharts theme file to apply style to the charts.

  4. Add the gauge and the theme as a dependency to the core.

  5. Store the chart configurations in a JSON object. In this JSON object:

    • Set the chart type as angulargauge. Each chart type is represented with a unique chart alias. For Angular Gauge, the alias is angulargauge. Find the complete list of gauge types with their respective alias here.
    • Set the width and height (in pixels).
    • Set the dataFormat as JSON.
    • Embed the json data as the value of the dataSource.

  6. Add a container (instance) for the gauge.

The consolidated code is shown below:

The fusioncharts package for npm can now be used in two different ways:
  • FusionCharts ES module
  • FusionCharts CJS module
The steps to render the gauge for both the modules are shown below:

ES6


// Include the core fusioncharts file from core  -
import FusionCharts from 'fusioncharts/core';

// Include the gauge from viz folder
// E.g. - import ChartType from fusioncharts/viz/[ChartType]
import AngularGauge from 'fusioncharts/viz/angulargauge';

// Include the fusion theme
import FusionTheme from 'fusioncharts/themes/es/fusioncharts.theme.fusion'

// Add the gauge and theme as dependency
// E.g. FusionCharts.addDep(ChartType)
FusionCharts.addDep(AngularGauge);
FusionCharts.addDep(FusionTheme);

// Create an Instance with chart options
var gaugeInstance = new FusionCharts({
    type: 'angulargauge', // The gauge type
    width: '450', // Width of the gauge
    height: '250', // Height of the gauge
    dataFormat: 'json', // Data type
    renderAt:'chart-container', //container where the chart will render
    dataSource: {
        // Gauge Configuration
        "chart": {
            "caption": "Nordstorm's Customer Satisfaction Score for 2017",
            "lowerLimit": "0",
            "upperLimit": "100",
            "showValue": "1",
            "numberSuffix": "%",
            "theme": "fusion",
            "showToolTip": "0"
        },
        // Chart Data
        "colorRange": {
            "color": [{
                "minValue": "0",
                "maxValue": "50",
                "code": "#F2726F"
            }, {
                "minValue": "50",
                "maxValue": "75",
                "code": "#FFC533"
            }, {
                "minValue": "75",
                "maxValue": "100",
                "code": "#62B58F"
            }]
        },
        "dials": {
            "dial": [{
                "value": "81"
            }]
        }
    }
});
// Render
gaugeInstance.render();

CJS


var FusionCharts = require('fusioncharts');
var Widgets = require('fusioncharts/fusioncharts.widgets');
var FusionTheme = require('fusioncharts/themes/fusioncharts.theme.fusion');
Widgets(FusionCharts);
FusionTheme(FusionCharts);


// Create an Instance with chart options
var gaugeInstance = new FusionCharts({
    type: 'angulargauge', // The gauge type
    width: '450', // Width of the gauge
    height: '250', // Height of the gauge
    dataFormat: 'json', // Data type
    renderAt:'chart-container', //container where the chart will render
    dataSource: {
        // Gauge Configuration
        "chart": {
            "caption": "Nordstorm's Customer Satisfaction Score for 2017",
            "lowerLimit": "0",
            "upperLimit": "100",
            "showValue": "1",
            "numberSuffix": "%",
            "theme": "fusion",
            "showToolTip": "0"
        },
        // Chart Data
        "colorRange": {
            "color": [{
                "minValue": "0",
                "maxValue": "50",
                "code": "#F2726F"
            }, {
                "minValue": "50",
                "maxValue": "75",
                "code": "#FFC533"
            }, {
                "minValue": "75",
                "maxValue": "100",
                "code": "#62B58F"
            }]
        },
        "dials": {
            "dial": [{
                "value": "81"
            }]
        }
    }
});
// Render
gaugeInstance.render();



<html>
<head>
    <title>My first gauge using FusionWidgets XT</title>
    <!-- Include fusioncharts core library -->
    <script type="text/javascript" src="https://cdn.fusioncharts.com/fusioncharts/latest/fusioncharts.js"></script>
    <!-- Include fusion theme -->
    <script type="text/javascript" src="https://cdn.fusioncharts.com/fusioncharts/latest/themes/fusioncharts.theme.fusion.js"></script>
    <script type="text/javascript">
        FusionCharts.ready(function() {
            var csatGauge = new FusionCharts({
                "type": "angulargauge",
                "renderAt": "chart-container",
                "width": "450",
                "height": "250",
                "dataFormat": "json",
                "dataSource": {
                    // Chart Configuration
                    "chart": {
                        "caption": "Nordstorm's Customer Satisfaction Score for 2017",
                        "lowerLimit": "0",
                        "upperLimit": "100",
                        "showValue": "1",
                        "numberSuffix": "%",
                        "theme": "fusion",
                        "showToolTip": "0"
                    },
                    // Chart Data
                    "colorRange": {
                        "color": [{
                            "minValue": "0",
                            "maxValue": "50",
                            "code": "#F2726F"
                        }, {
                            "minValue": "50",
                            "maxValue": "75",
                            "code": "#FFC533"
                        }, {
                            "minValue": "75",
                            "maxValue": "100",
                            "code": "#62B58F"
                        }]
                    },
                    "dials": {
                        "dial": [{
                            "value": "81"
                        }]
                    }
                }
            });
            csatGauge.render();
        });
    </script>
</head>
<body>
    <div id="chart-container">An angular gauge will load here!</div>
</body>
</html>



<html>
<head>
    <title>My first gauge using FusionWidgets XT</title>
    <!-- Include fusioncharts core library -->
    <script type="text/javascript" src="path/to/local/fusioncharts.js"></script>
    <!-- Include fusion theme -->
    <script type="text/javascript" src="path/to/local/themes/fusioncharts.theme.fusion.js"></script>
    <script type="text/javascript">
        FusionCharts.ready(function() {
            var csatGauge = new FusionCharts({
                "type": "angulargauge",
                "renderAt": "chart-container",
                "width": "450",
                "height": "250",
                "dataFormat": "json",
                "dataSource": {
                    // Chart Configuration
                    "chart": {
                        "caption": "Nordstorm's Customer Satisfaction Score for 2017",
                        "lowerLimit": "0",
                        "upperLimit": "100",
                        "showValue": "1",
                        "numberSuffix": "%",
                        "theme": "fusion",
                        "showToolTip": "0"
                    },
                    // Chart Data
                    "colorRange": {
                        "color": [{
                            "minValue": "0",
                            "maxValue": "50",
                            "code": "#F2726F"
                        }, {
                            "minValue": "50",
                            "maxValue": "75",
                            "code": "#FFC533"
                        }, {
                            "minValue": "75",
                            "maxValue": "100",
                            "code": "#62B58F"
                        }]
                    },
                    "dials": {
                        "dial": [{
                            "value": "81"
                        }]
                    }
                }
            });
            csatGauge.render();
        });
    </script>
</head>
<body>
    <div id="chart-container">An angular gauge will load here!</div>
</body>
</html>

That's it! Your first gauge using Plain JavaScript is ready.

Problem rendering the chart?

In case there is an error, and you are unable to see the chart, check for the following:

  • If you are getting a JavaScript error on your page, check your browser console for the exact error and fix accordingly. If you're unable to solve it, click here to get in touch with our support team.

  • If the chart does not show up at all, but there are no JavaScript errors, check if the FusionCharts Suite XT JavaScript library has loaded correctly. You can use developer tools within your browser to see if fusioncharts.js was loaded.

  • If you get a Loading Data or Error in loading data message, check whether your JSON data structure is correct, or there are conflicts related to quotation marks in your code.