Highcharts can be extended through plugins that allow us to add functionality without disturbing the core layer of code and are easy to share. There is a library of plugins available online contributed by Highcharts staff and other users at http://www.highcharts.com/plugin-registry. One distinct advantage of developing features out of plugins is that we can pick and choose the plugin features and build a compressed JavaScript library from them. In fact, we can already do something similar with the Highcharts library on the download page.
In this section, we will take a tour of a couple of plugins that you may find handy.
When we create a scatter plot with lots of data points, it is often worthwhile to overlay them with a regression line. Of course, we can always achieve this by adding a line series manually. However, we still need to write the code for regression analysis. It is much more convenient to include a plugin. The Highcharts regression...
