by Joseph Rézeau.
Further to Bernard's suggestion I have started experimenting with RGraph which uses HTML5 and JavaScript. It looks more "dynamic" than PHP-based PChart and is actively maintained.
I also found that, for my so-called "Personality test" Questionnaire needs, both the "rose" and "bi-polar" libraries provided excellent results, see attached.
However, as pointed by Danny Wahl, RGraph uses JQuery, which is not the library of choice in Moodle. I have no idea how far this is a problem.
Where should we go from here? Anyone interested try out various Graph libraries and post their findings in this thread or should a proper bug report be started or what?
Joseph