How to add edge labels in Graphviz

dotgraphviz

I am trying to draw a graph using Graphviz, but I need to add labels on the edges. There does not seem to be any way to that in Graphviz.
Are there a way out?

Best Answer

You use the label property attached to the edge.

digraph G {
 a -> b [ label="a to b" ];
 b -> c [ label="another label"];
}

The above generates a graph that looks something like this.

alt text

Related Solutions

GraphViz edge labels

labelloc and labeljust are meaningless for edges. See here, it says "GC" as Graph, Cluster or "N" as Node, respectively.

You could, however, consider generating unique nodes for each condition with labels. Then there would be multiple nodes with different "dot ID's", but a same label (condition's text), so it would be clear if it was A.h or C.h that incuded B.h. I think You will be pleased with the results, as You already stated that it looks ok.

Good luck!

Automatic multiline labels in Graphviz

Yes, HTML-like labels (<...>) support
tag, using which you can break the lines. E.g.

"A" -> "B"
[label = <1. <br/>
 2. <br/>
 3. <br/>
 4. <br/>
 .... <br/> 
> color="blue" style="dashed"];

These also work when embedding Graphviz in LaTeX, where \n would not.

Best Answer

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GraphViz edge labels

Automatic multiline labels in Graphviz

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