I don't know about the article, but DOT[0] + graphviz[1] could be used for this. [0] https://en.wikipedia.org/wiki/DOT_(graph_description_language) https://en.

I don't know about the article, but DOT[0] + graphviz[1] could be used for this. [0] https://en.wikipedia.org/wiki/DOT_(graph_description_language) https://en.wikipedia.org/wiki/DOT_(graph_description_languag... [1] http://www.graphviz.org/ http://www.graphviz.org/