[solved] Same attribute value for all elements of a graph?

1

Hello
Is it possible to set the same attribute value for all elements of a graph?
(Example: same fontsize)

I saw https://graphviz.org/docs/graph/
But how can we do it?
graph [fontsize=“20pt”] { … makes an error.

Thanks by advance for your help.

2

I believe that the “pt” was a fairly recent improvement but before is was graph [fontsize=20].
What version of Graphviz are you using? (type dot -V)

3

I’m using graphviz with

graph [fontsize=20] makes an error.

You can see an example

4

the attributes need to be within the braces.
Like so:

graph { graph [fontsize=20] 
    Placement [shape=polygon]
   Placement  -- replaced
}

or with arrows (directed)

digraph { graph[fontsize=20] 
    Placement [shape=polygon]
  Placement  -> replaced
}
5 
graph { graph [fontcolor="red"] 
    a [shape=polygon]
b [fontcolor="red"]
}

[dot]
graph { graph [fontcolor=“red”]
a [shape=polygon]
b [fontcolor=“red”]
}
[/dot]

Doesn’t work in visual, with js or here.
I put fontcolor to see it easily.

I want ‘a’ to be red also.

See in visual

6

You are correct. fontcolor can apply to four object types and you need to declare the (up to four) defaults separately.

graph { 
  graph [fontcolor="blue" label="my graph"] 
  node [fontcolor=green]
  edge [fontcolor=pink label="\E"]
 subgraph cluster90 {
  graph [label="gathered" fontcolor=purple]
    a [shape=polygon]
   b [fontcolor="red"]
   a -- b
 }
}
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