Graphviz Dot, mix directed and undirected

Question

For my application I need to represent simultaneously (on the same graph) two relations: one is simmetric, the other is not.

Targets:

Ideally the two relation should result in edges having different colors;
For the symmetric relation I would like not to have double-edges;

Is there a way of doing this with dot?

score 55 · Accepted Answer · answered Nov 05 '12 at 17:12

55

digraph {

    A; B; C

    subgraph Rel1 {
        edge [dir=none, color=red]
        A -> B -> C -> A
    }

    subgraph Rel2 {
        edge [color=blue]

        B -> C
        C -> A
    }

}

enter image description here

answered Nov 05 '12 at 17:12

Dacav

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2

Does anybody know simpler solution of combining gigraph with graph? – user1742529 Oct 10 '19 at 08:49
@user1742529 Not sure what you mean, there’s no such combination happening here. Possibly you’re confused by the word “subgraph”; that’s just basic compartmentalization, a way of saying THESE lines should be blue and THOSE lines should be orange. – Frungi Jan 12 '21 at 04:07
@Frungi, sorry. I mean: simpler solution for combining "digraph" with "graph"? ( https://graphviz.readthedocs.io/en/stable/api.html#graphviz.Digraph ) – user1742529 Jan 17 '21 at 16:17

score 14 · Answer 2 · answered Jul 17 '20 at 12:04

14

You can pass dir=none as an edge property to the undirected graph connections:

digraph {

    A; B; C
    
    A -> B
    B -> C
    C -> A [dir=none]
}

answered Jul 17 '20 at 12:04

Daniel

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This answer helped me, for the case where you have only one relation, but conditional. – Ferazhu May 18 '22 at 18:26

Graphviz Dot, mix directed and undirected

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