Graphviz：左右子图，子图中的左右子图

Question

我想要实现的是并排的集群（子图），而它们的内容也是并排的，如图所示：

但我所能做的就是子图的上下行为，如图所示：

我知道这是一个悬而未决的问题 (Allow different rankdir for subgraph cluster)

但我也看到了类似问题的一些解决方法（即 top-down subgraphs, left-right inside subgraphs, GraphViz - How to have a subgraph be left-to-right when main graph is top-to-bottom?）

根据解决方法，我可以获得对角线表示：

但不是想要的。

这是我的 .Dot 文件：

    digraph {
    node [shape=plain]
    rankdir=LR;

  subgraph cluster_Asia { 
        label = "Asia";

        China [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>China</i></td></tr>
          <tr><td bgcolor="yellow" port="Shanghai">Shanghai</td></tr>
          <tr><td bgcolor="white" port="Beijing">Beijing</td></tr>
          <tr><td bgcolor="white" port="Chongqing">Chongqing</td></tr>
          <tr><td bgcolor="white" port="Tianjin">Tianjin</td></tr>
        </table>>];
        
          India [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>India</i></td></tr>
          <tr><td bgcolor="yellow" port="NewDelhi">NewDelhi</td></tr>
          <tr><td bgcolor="white" port="Mumbai">Mumbai</td></tr>
          <tr><td bgcolor="white" port="Bangalore">Bangalore</td></tr>
          <tr><td bgcolor="white" port="Ahmadabad">Ahmadabad</td></tr>
        </table>>];

        Thailand [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Thailand</i></td></tr>  
          <tr><td bgcolor="yellow" port="Bangkok">Bangkok</td></tr>
          <tr><td bgcolor="white" port="ChiangRai">ChiangRai</td></tr>
        </table>>];
        
        Nepal [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Nepal</i></td></tr>
          <tr><td bgcolor="yellow" port="Kathmandu">Kathmandu</td></tr>
          <tr><td bgcolor="white" port="Birgunj">Birgunj</td></tr>
        </table>>];
          
        China:Shanghai->Thailand:Bangkok[color="blue", style=solid ]
        China:Beijing->Nepal:Kathmandu[color="blue", style=solid ]
        China:Tianjin->India:NewDelhi[color="blue",style=solid ]
        China:Chongqing->India:Ahmadabad[color="blue", style=solid ]
        India:Ahmadabad->India:Mumbai[color="blue", style=solid ]
}

  subgraph cluster_Europe {
        label = "Europe"; 

        Spain [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Spain</i></td></tr>
          <tr><td bgcolor="yellow" port="Madrid">Madrid</td></tr>
          <tr><td bgcolor="white" port="Malaga">Malaga</td></tr>
          <tr><td bgcolor="white" port="Barcelona">Barcelona</td></tr>
          <tr><td bgcolor="white" port="Valencia">Valencia</td></tr>
        </table>>];
        
        Netherlands [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Netherlands</i></td></tr>
          <tr><td bgcolor="yellow" port="Amsterdam">Amsterdam</td></tr>
          <tr><td bgcolor="white" port="Rotterdam">Rotterdam</td></tr>
          <tr><td bgcolor="white" port="Dokkum">Dokkum</td></tr>
        </table>>];
        
        Italy [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Italy</i></td></tr>
          <tr><td bgcolor="yellow" port="Rome">Rome</td></tr>
          <tr><td bgcolor="white" port="Venice">Venice</td></tr>
          <tr><td bgcolor="white" port="Milan">Milan</td></tr>
        </table>>];
        
        France [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>France</i></td></tr>
          <tr><td bgcolor="yellow" port="Paris">Paris</td></tr>
          <tr><td bgcolor="white" port="Nice">Nice</td></tr>
          <tr><td bgcolor="white" port="Marseille">Marseille</td></tr>
        </table>>];

        Spain:Madrid->Netherlands:Dokkum[ color="blue",style=solid ]
        Spain:Barcelona->Italy:Milan[ color="blue",style=solid ]
        Spain:Malaga->Netherlands:Amsterdam[color="blue", style=solid ]
        Spain:Valencia->France:Nice[color="blue", style=solid ]
}


    // {  rank=same;
        // 00 [style=invis];
        // 01 [style=invis];
        // 00 -> 01 [constraint=false,style=invis];
    // }

     // 00 -> Spain [style=invis];
     // 01 -> China [style=invis];
    
   // Spain -> China [ style=invis];
}

请注意，代码范围底部的对角线代码被注释掉了。

我的问题:

如何更改我的代码以获得与第一张图片尽可能相似的结果？

Answer 1

感谢 Albert 的评论，我找到了解决方案：

这是代码：

digraph {
    node [shape=plain]
    rankdir=LR;

subgraph cluster_Asia { 
    label = "Asia";

    China [label=<<table border="0" cellborder="1" cellspacing="0">
      <tr><td><i>China</i></td></tr>
      <tr><td bgcolor="yellow" port="Shanghai">Shanghai</td></tr>
      <tr><td bgcolor="white" port="Beijing">Beijing</td></tr>
      <tr><td bgcolor="white" port="Chongqing">Chongqing</td></tr>
      <tr><td bgcolor="white" port="Tianjin">Tianjin</td></tr>
    </table>>];
    
      India [label=<<table border="0" cellborder="1" cellspacing="0">
      <tr><td><i>India</i></td></tr>
      <tr><td bgcolor="yellow" port="NewDelhi">NewDelhi</td></tr>
      <tr><td bgcolor="white" port="Mumbai">Mumbai</td></tr>
      <tr><td bgcolor="white" port="Bangalore">Bangalore</td></tr>
      <tr><td bgcolor="white" port="Ahmadabad">Ahmadabad</td></tr>
    </table>>];

    Thailand [label=<<table border="0" cellborder="1" cellspacing="0">
      <tr><td><i>Thailand</i></td></tr>  
      <tr><td bgcolor="yellow" port="Bangkok">Bangkok</td></tr>
      <tr><td bgcolor="white" port="ChiangRai">ChiangRai</td></tr>
    </table>>];
    
    Nepal [label=<<table border="0" cellborder="1" cellspacing="0">
      <tr><td><i>Nepal</i></td></tr>
      <tr><td bgcolor="yellow" port="Kathmandu">Kathmandu</td></tr>
      <tr><td bgcolor="white" port="Birgunj">Birgunj</td></tr>
    </table>>];
      
    China:Shanghai->Thailand:Bangkok[color="blue", tyle=solid ]
    China:Beijing->Nepal:Kathmandu[color="blue", style=solid ]
    China:Tianjin->India:NewDelhi[color="blue",style=solid ]
    China:Chongqing->India:Ahmadabad[color="blue", style=solid ]
    India:Ahmadabad->India:Mumbai[color="blue", style=solid ]
}


  
  subgraph cluster_Europe {
        label = "Europe"; 

        Spain [label=<<table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Spain</i></td></tr>
          <tr><td bgcolor="yellow" port="Madrid">Madrid</td></tr>
          <tr><td bgcolor="white" port="Malaga">Malaga</td></tr>
          <tr><td bgcolor="white" port="Barcelona">Barcelona</td></tr>
          <tr><td bgcolor="white" port="Valencia">Valencia</td></tr>
        </table>>];
        
        Netherlands [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Netherlands</i></td></tr>
          <tr><td bgcolor="yellow" port="Amsterdam">Amsterdam</td></tr>
          <tr><td bgcolor="white" port="Rotterdam">Rotterdam</td></tr>
          <tr><td bgcolor="white" port="Dokkum">Dokkum</td></tr>
        </table>>];
        
        Italy [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>Italy</i></td></tr>
          <tr><td bgcolor="yellow" port="Rome">Rome</td></tr>
          <tr><td bgcolor="white" port="Venice">Venice</td></tr>
          <tr><td bgcolor="white" port="Milan">Milan</td></tr>
        </table>>];
        
        France [label=<
        <table border="0" cellborder="1" cellspacing="0">
          <tr><td><i>France</i></td></tr>
          <tr><td bgcolor="yellow" port="Paris">Paris</td></tr>
          <tr><td bgcolor="white" port="Nice">Nice</td></tr>
          <tr><td bgcolor="white" port="Marseille">Marseille</td></tr>
        </table>>];

        Spain:Madrid->Netherlands:Dokkum[ color="blue",style=solid ]
        Spain:Barcelona->Italy:Milan[ color="blue",style=solid ]
        Spain:Malaga->Netherlands:Amsterdam[color="blue", style=solid ]
        Spain:Valencia->France:Nice[color="blue", style=solid ]
}

    {  
      00 [style=invis];
      01 [style=invis];
      02 [style=invis];
      03 [style=invis];
      00 -> 01 -> 02 -> 03 [style=invis];

      00 -> Spain [style=invis];
      01 -> Netherlands [style=invis];
      01 -> Italy [style=invis];
      01 -> France [style=invis];
      02 -> China [style=invis];
      03 -> Nepal [style=invis];
      03 -> Thailand [style=invis];
      03 -> India [style=invis];
    
    Spain -> China [ style=invis];
    }
}

最后一个范围是修复布局。

Graphviz：左右子图，子图中的左右子图

Graphviz: Left-Right subgraphs, Left-Right inside subgraphs

visualization

graphviz

dot

subgraph