Graphviz 如何在点中创建簇？

假设，我想在图中的几个节点之间建立一个子集群（以某种方式表示这些节点出于某种原因而聚集在一起，例如）：

正如你所看到的，我只是部分成功。也就是说，

asti

位于其自身的灰显集群中，但节点

B

和

E

不在其中

有人能指出我如何将所有三个节点

E

、

B

和

asti

放置在灰色集群中吗

谢谢

---

使用

newrank=true

避免“取消装箱”群集

digraph G {
  A [group=g1]
  {rank = same; B[group=g2]; C[group=g3]}
  D [group=g1]
  {rank = same; E[group=g2]; F[group=g3]}

  A -> B [label="2", weight=2]
  A -> C [label="0", style=dashed, weight=2]
  B -> C [label="0", style=dashed, weight=2]
  B -> D [label="2", style=dashed, weight=2]
  C -> D [label="0", weight=2]
  D -> E [label="1", style=dashed, weight=2]
  D -> F [label="0", weight=2]
  E -> F [label="0", weight=2]
  F -> A

  edge[style=invis];
  A -> D
  B -> E
  C -> F

  subgraph cluster_0 {
    label = "I want this in its own sub-square"
    B->E
    B->Asti

    style=filled;
    color=lightgrey;
    node [style=filled,color=white];
    edge[style=invis];
  }

}

digraph G {
  newrank=true;

  A [group=g1]
  {rank = same; B[group=g2]; C[group=g3]}
  D [group=g1]
  {rank = same; E[group=g2]; F[group=g3]}

  A -> B [label="2", weight=2]
  A -> C [label="0", style=dashed, weight=2]
  B -> C [label="0", style=dashed, weight=2]
  B -> D [label="2", style=dashed, weight=2]
  C -> D [label="0", weight=2]
  D -> E [label="1", style=dashed, weight=2]
  D -> F [label="0", weight=2]
  E -> F [label="0", weight=2]
  F -> A

  edge[style=invis];
  A -> D
  B -> E
  C -> F

  subgraph cluster_0 {
    label = "I want this in its own sub-square"
    B->E
    B->Asti

    style=filled;
    color=lightgrey;
    node [style=filled,color=white];
    edge[style=invis];
  }

}