Thank you Jochen.
despite the example you sent and the days I spent previously, I cannot get it working.
So I think I will stop digging even if it looks of interest.
(too complex to try to add all the pieces of the configuration in place, like the various environment and configurations files, and then too complex to try to get a clear example for the types of graph I want to use).
Can you please provide an example of using a SQL query to populate a RGraph commande in an article?
(I can also inject php/script code in articles or modules using the "RegularLabs" plugins).
If the example can be with a radar graph, the better!
thanks in advance