Hi, Org people. Long time no talk! :-)
In the Org manual, we see: 3.6 Org-Plot ============ Org-Plot can produce 2D and 3D graphs of information stored in org tables using `Gnuplot' `http://www.gnuplot.info/' and `gnuplot-mode' `http://xafs.org/BruceRavel/GnuplotMode'. The last link does not work properly. However, I found: https://github.com/bruceravel/gnuplot-mode which could probably replace it. I did not try the mode yet, however. François P.S. I've been away for a while, for health reasons. As I am not fully back yet, I may follow up and reply only sporadically.
