Then, for each category in the data model we apply the formula mentioned above for calculating the pie slice angle. If one is supplied, this element is filled in with the HTML code containing a colored box and the name of the data model category. To do that, we will use the fillText(text,x,y) function of the drawing context. 2.Sectors within the Pie chart can be drawn using method In additional, the PHP data array is automatically converted to JavaScript … Let's modify the code of the Piechart class to do that. Inserting a small piece of HTML into your web page. Dynamic charts are required when you are displaying data that changes with time like stock price, temperature, etc. Each dataPoint has x variable determining the position on the horizontal axis and y variable determining the position of the vertical axis. Let’s create a nice container area to put our graph in. This is structured in a format specific to the type of chart. In fact, the process for creating the graph is pretty much identical: choose a design, add data, customize labels, preview your chart… We then load the JS code via the