Our graph api is outdated and doesn't support much.

Update options are :-

• Get a new Open source php library, eg one of:
  • pChart: http://www.pchart.net/
  • Hicharts: https://github.com/ghunti/HighchartsPHP
• Javascript based charting library
  • RGraph: http://www.rgraph.net/
  • Chart.js: http://www.chartjs.org/
  • C3.js http://c3js.org/
  • a JQuery based Graphing lib?

Current use of the graphs api in core:

• Survey module
• User activity reports
• Quiz reports
• Scorm graph report