Graphviz: how to set 'default' arrow style?

Question

Consider this dot language code:

digraph graphname {
    subgraph clusterA {
        node [shape=plaintext,style=filled];
        1 -> 2 [arrowhead=normal,arrowtail=dot];
        2 -> 3 -> X2 -> 5;
        6;
        7;
        label = "A";
        color=blue
    }
}

In the above example, only the 1 -> 2 connection will have the arrowhead=normal,arrowtail=dot style applied; all the other arrows will be of the "default" style.

My question is - how do I set the arrow style (for the entire subgraph - or for the entire graph), without having to copy paste "[arrowhead=normal,arrowtail=dot];" next to each edge connection?

EDIT: Just for reference - the answer from Jesse didn't contain any code; I wrote that snippet and had it in this space here - for unknown reasons, a moderator cut it off from here and pasted it into Jesse's answer.

Samuel Harmer · Accepted Answer · 2018-08-29 09:26:14Z

51

Use the edge attribute statement, as stated in the DOT Language documentation.

digraph graphname {
    subgraph clusterA {
        node [shape=plaintext,style=filled];
        edge [arrowhead=normal,arrowtail=dot];
        1 -> 2 ;
        2 -> 3 -> X2 -> 5;
        6;
        7;
        label = "A";
        color=blue
    }
}

edited Aug 29, 2018 at 9:26

Samuel Harmer

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answered Dec 22, 2010 at 22:50

JesseW

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2 Comments

sdaau Over a year ago

Awesome - thanks for the answer, @JesseW - accept for the reference :) Btw, I was just found doxygen - how to change default font size for graphviz? - Stack Overflow which also, pretty much, explains the same :)

Rod Over a year ago

Just a note: you can also do this on the command line (i.e., without modifying the DOT file) by adding a command line parameter like -Earrowtail=dot. More generally -E is used to set default edge attributes, -N to set default node attributes and -G to set default graph attributes.

Fabian Steeg · Accepted Answer · 2010-12-22 22:50:59Z

10

Just like you did for nodes, but using edge, e.g. edge[style=dashed]

answered Dec 22, 2010 at 22:50

Fabian Steeg

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1 Comment

sdaau Over a year ago

Thanks for the quick answer too, @Fabian Steeg - gave the accept to @JesseW cause of the link :) Cheers!

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