This article presents an easy-to-follow guide for building an interactive linear gauge chart in JavaScript.
We’ll show how to quickly create a cool and interactive linear gauge chart that highlights Covid-19 vaccination data around the world. Our chart will allow us to visualize the status of Covid-19 vaccination at the time of writing, and will display two types of data — showing how far away we are from the halfway target of both partially and fully vaccinating the global population.
What Is a Linear Gauge Chart?
Data visualization is an invaluable tool, given the vast amount of data being created and numerous possibilities for gleaning information from data. Data visualization is particularly useful for identifying trends, interpreting patterns, and communicating complex ideas to the target audience.
A linear gauge chart represents a vertical or horizontal linear scale that shows the required values, with a color scale along with single or multiple pointers. The minimum and maximum values of the data range can be set over the axes according to the data being represented. The pointer position indicates the current value of the metric.
A gauge chart can display a single value or multiple values using an individual pointer or a combination of markers. The pointer can be a needle or a line with a marker of any shape like a circle, square, rectangle or triangle.
The linear gauge chart type is an effective visual representation for displaying how close or far the values are from the desired data point.
Types of linear gauges
The several types of linear gauges are thermometer chart, bullet chart, tank chart and LED chart. The mercury thermometer — consisting of minor ticks that displays the temperature with the pointer value — is a classic example of a linear gauge chart.
The linear gauge visualization we’ll be building
Here’s a sneak peek at the final linear gauge chart. Follow this tutorial to learn how we build this interesting and informative linear gauge chart with JavaScript.
The Four Steps to Building a JavaScript Linear Gauge
It’s always useful to have some skills with technologies like HTML and JavaScript. But in this tutorial, we’re using a JS charting library that makes it easier to create compelling charts like the linear gauge even with minimal technical knowledge.
There are several JavaScript charting libraries for visualizing data with ease, and here we’re creating the linear gauge chart with AnyChart. This library is flexible, with extensive documentation, …….
Source: https://www.sitepoint.com/create-linear-gauge-chart-javascript/