In the example above, simple HTML is used to display the title. Created and maintained by Piotr and Oskar. Hire us Interested in your own custom designed visualizations? In Highcharts, pies can also be hollow, in which case they are commonly referred to as donut charts. For donuts you can fill the empty space in the centre with useful total sum information. For an overview of the area chart options see the API reference. For example, the colour of a the dataset's arc are generally set this way. Open phpMyAdmin. width: integer pixels width of donut. Also, the animation.startup option available for many other Google Charts is not available for the Gauge Chart. HTML: /echo/html/ A doughnut Chart is a circular chart with a blank center. In this example, we create a bar chart for a single dataset and render that in our page. /echo simulates Async calls: