graphviz example

graph.dot

// https://en.wikipedia.org/wiki/Graph_(discrete_mathematics)

digraph D {
    graph [concentrate=true];
    layout=neato;
    // rankdir=LR;
    edge [dir=none];

    6 -> 4 -> 5;
    4 -> {6 3 5};
    5 -> 1;
    1 -> 2;
    2 -> 3;
    3 -> 4;
    5 -> 2;
}

// $ dot -T png graph.dot -o example.png
// $ dot -T pdf graph.dot -o example.pdf