Graphviz 布局从左到右，然后从上到下答案

【问题标题】：Graphviz layout left to right, then top to bottomGraphviz 布局从左到右，然后从上到下
【发布时间】：2019-03-11 19:22:00
【问题描述】：

digraph finite_state_machine {
    size="8,5"
    rankdir=LR;
      node [shape = doublecircle]; beg, end;
      node [shape = circle];

  subgraph clusterG1 {
    label="area code";
    beg -> ac1 [ label = "(" ];
    ac1 -> ac2 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    ac2 -> ac3 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    ac3 -> ac4 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
  }

    ac4 -> ex1 [ label = ")" ];

  subgraph clusterG2 {
    label="exchange"
    ex1 -> ex2 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    ex2 -> ex3 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    ex3 -> ex4 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
  }

  ex4 -> num1 [ label = "-" ];

  subgraph clusterG3 {
    label="number"
    num1 -> num2 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    num2 -> num3 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    num3 -> num4 [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
    num4 -> end [ label = "0,1,2,3,4,\n5,6,7,8,9,0" ];
  }

}

给出这个：

（对不起，太小了：）

这是一个简单的线性图。我想从左到右有三个盒子，每个盒子在内部从上到下组织。经过大量的谷歌搜索，我仍然不知道该怎么做！

【问题讨论】：

标签： graphviz

【解决方案1】：

基本上你可以将constraint=false 属性添加到连接集群之间节点的边缘：

ac4 -> ex1 [ label = ")", constraint=false ];

ex4 -> num1 [ label = "-", constraint=false ];

该属性禁止边影响连接节点的排名位置。换句话说，它添加了连接箭头，但头部和尾部的位置仍然像根本没有连接一样。

不过，您将面临另一个问题 - 如果您的集群并排，您将连接一个集群的底部与另一个集群的顶部，这将导致在整个图中丑陋的重叠边。

如果您在解决该问题时遇到困难，请告诉我您希望如何解决该问题，我们可以一起解决问题。

【讨论】：