Re: [graphviz-interest] empty cluster with a size

On 8/14/14, 6:52 PM, Ron Newman wrote:
> I need to have a cluster which contains zero nodes, yet has a "bb" 
> parameter corresponding to a size specified in the input.  As it is, 
> Graphviz returns a "bb" parameter in that case but it's empty.
>
> Maybe something like the size attribute for a graph, but for a 
> subgraph.  Or some other trick to get it to output a "bb" parameter 
> that I specify.  Can't postprocess the output because the empty 
> cluster, since it has a size, needs to be taken into account during 
> layout.
>
> I can't use a node of type point or style=invis inside the cluster, 
> for reasons that would take too long to explain.  I'll also spare you 
> the long explanation of the purpose of having an empty cluster, unless 
> you're really interested.
>
> --
But if you are using dot for layout, how will you know where your 
cluster will appear relative to the layout of the rest of the graph?
Clusters are second-order objects; their positions and sizes are 
determined by the nodes they contain. Why not just use a rectangular node
of the desired size?
It would be helpful to know why you need an empty cluster in order to 
suggest a workaround. If you feel the explanation doesn't warrant 
posting, you
can just respond to me.

    Emden


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