Some days ago I also searched for that thing, but haven’t got any suitable option. I used a third party library for showing my graphs and charts. So firstly I’ll suggest you to visit those two directories wp-includes/js/ and wp-admin/js/ Those are the JavaScript libraries included with WordPress by default. If you find nothing to meet your need there then please look for any third party JavaScript library for charts and graphs. I think it’s better to use jQuery or Backbone JS based libraries cause those are already included with WordPress. So you just need to enqueue the third party scripts after jQuery or Backbone and do necessary tasks to show the charts. There are many third party scripts out there to show the charts or graphs. Just choose one and use it to your system.
