如何改变Graphviz子图级别？

Question

我希望子图clusterCG的排名与3相同（clusterCG不包含3）

digraph G{
 rankdir = LR;
 node [shape = none]

 1->2->3->4[arrowhead=none]

 node [shape = ellipse]

 A->A2->A3;

 subgraph clusterCG{
  shape = rect;
  rank=same;
  A2;
  B;
  C;
  color=blue;
  label="C";
 }

 { rank=same; 1; A;}
 { rank=same; 3; CG;}
 { rank=same; 4; A3;}
}

CG生成为具有等级3的独立节点。

我希望子图clusterCG具有等级3.

Answer 1

也许不是最好的解决方案，但似乎零大小的节点是唯一可行的

digraph G{
 rankdir = LR;
 node [shape = none]

1->2->3->4[arrowhead=none]

node [shape = ellipse]
ACG[shape = none,label="",width=0, height=0];

CG->A2 [style=invis,constraint=false];

A->ACG[arrowhead=none];
ACG->A2->A3;

 subgraph clusterCG{
  shape = rect;
  rank=same;
  A2;
  B;
  C;
  color=blue;
  label="C";
 }

 { rank=same; 1; A;}
 { rank=same; 2; ACG;}
 { rank=same; 4; A3;}

}

Answer 2

使用不同的排名算法＆＃34; newrank = true＆＃34;

 digraph G {
 newrank=true
 rankdir = LR;
 node [shape = none]

 1->2->3->4[arrowhead=none]

 node [shape = ellipse]

 A->A2->A3;

 subgraph clusterCG{
  shape = rect;
  rank=same;

  A2;
  B;
  C;
  color=blue;
  label="C";
 }

 { rank=same; 1; A;}
 { rank=same; 3; A2}
 { rank=same; 4; A3;}
}