Graphviz点节点的垂直对齐

我得到了这个点图，希望节点A和D，B和E，C和F对齐。以下是相关的dot代码：

digraph{

A
B
C
D
E
F

{rank = same; B; C}
{rank = same; E; F}

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
}

正如您所见，我已经尝试将权重应用于边缘，但没有成功

---

可以使用节点的

组

属性建议将同一组节点之间的边对齐成一条直线

声明具有group属性的节点：

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

然后确保所有这些节点之间都有一条（不可见）边：

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

一切都在一起：

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
}