Subgraph layout in graphviz

bdur picture bdur · Sep 17, 2012 · Viewed 10.2k times · Source

I have code to display two subgraphs:

graph {
    rankdir=LR;
    subgraph cluster01 {
        label="t=0"
        a0 [label="A"];
        a1 [label="B"];
        a2 [label="C"];
        a5 [label="E"];
        a0 -- a1;
        a1 -- a2 ;
        a2 -- a0;
    };

    subgraph cluster02
    {
        label="t=10"
        b0 [label="A"];
        b5 [label="E"];
        b1 [label="B"];
        b2 [label="C"];

        b0 -- b1;
        b2 -- b5;
    };

    a0--b0 [style=dotted];
    a1--b1 [style=dotted];
    a2--b2 [style=dotted];
    a5--b5 [style=dotted];
}

This code displays two subgraphs like this:

http://i.stack.imgur.com/F23SY.png

But I want to have it like this:

http://i.stack.imgur.com/jUpIp.png

I hope someone will help me fix the "rankdir" to get it done.

Answer

marapet picture marapet · Sep 17, 2012

The following was achieved by using invisible edges and constraint=false on some edges:

graphviz output

graph {
    rankdir=LR;
    subgraph cluster01 {
        label="t=0";
        a0 [label="A"];
        a1 [label="B"];
        a2 [label="C"];
        a5 [label="E"];
        a0 -- a1;
        a1 -- a2;
        a2 -- a5 [style=invis];
        a2 -- a0 [constraint=false];
    };

    subgraph cluster02
    {
        label="t=10"
        b0 [label="A"];
        b5 [label="E"];
        b1 [label="B"];
        b2 [label="C"];

        b0 -- b1;
        b1 -- b2 [style=invis];
        b2 -- b5;
    };

    edge[constraint=false];
    a0--b0 [style=dotted];
    a1--b1 [style=dotted];
    a2--b2 [style=dotted];
    a5--b5 [style=dotted];
}