如何从graphviz获得平衡图? [英] How to get balanced diagrams from graphviz?

问题描述

graphviz中是否有设置来生成像这样的平衡图:

Is there a setting in graphviz to generate balanced diagrams like this:

正确的图表http://img3.imageshack.us/img3/6423/testaah .png

当图表如下图所示更复杂时-它不像上面图那样平衡(4低于**).

When diagram is more complex like below - it isn't balanced like that above (4 is below **).

未正确平衡http://img51.imageshack.us/img51/6632/test2b.png

生成第二张图的代码:

graph
{
  n1 [label="+"];
  n1 -- n2;
  n2 [label="/"];
  n2 -- n3;
  n3 [label="*"];
  n3 -- n4;
  n4 [label="1"];
  n3 -- n5;
  n5 [label="2"];
  n2 -- n6;
  n6 [label="3"];
  n1 -- n7;
  n7 [label="**"];
  n7 -- n8;
  n8 [label="4"];
  n7 -- n9;
  n9 [label="5"];
}

推荐答案

您可以引入新的不可见节点以重新平衡布局." (请参见 https://graphviz.org/faq/#FaqBalanceTree ).这样您的代码就变成了:

You can "introduce new, invisible nodes to re-balance the layout." (see https://graphviz.org/faq/#FaqBalanceTree). So your code becomes :

graph
{
  n1 [label="+"];
  n2 [label="/"];
  n1 -- n2;
  n1b1 [label="", width=.1, style=invis]
  n1 -- n1b1 [style=invis]  
  n1b2 [label="", width=.1, style=invis]
  n1 -- n1b2 [style=invis]  
  n1b3 [label="", width=.1, style=invis]
  n1 -- n1b3 [style=invis]  
  n7 [label="**"];
  n1 -- n7;
  { rank=same n2 -- n1b1 -- n1b2 -- n1b3 -- n7 [style=invis] }

  n3 [label="*"];
  n2 -- n3;
  n2b1 [label="", width=.1, style=invis]
  n2 -- n2b1 [style=invis]
  n6 [label="3"];
  n2 -- n6;
  { rank=same n3 -- n2b1 -- n6 [style=invis] }

  n8 [label="4"];
  n7 -- n8;
  n7b1 [label="", width=.1, style=invis]
  n7 -- n7b1 [style=invis]
  n9 [label="5"];
  n7 -- n9;
  { rank=same n8 -- n7b1 -- n9 [style=invis] }
  
  n3 -- n4;
  n4 [label="1"];
  n3 -- n5;
  n5 [label="2"];
}

使用此输出:

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