在 GraphViz 中绘图时如何在相同高度上获得连接的邻居节点？答案

【问题标题】：How to get connected neighbour nodes on the same height when drawing in GraphViz?在 GraphViz 中绘图时如何在相同高度上获得连接的邻居节点？
【发布时间】：2014-08-26 14:24:57
【问题描述】：

我正在尝试使用GraphViz 绘制以下（后缀树）：

digraph G {
  1[label = " "];
  2[label = " "];
  3[label = " "];
  4[label = " "];
  5[label = " "];
  6[label = " "];
  7[label = " "];
  8[label = " "];

  // edges drawn vertically, all fine.
  1 -> 2 [label="ab"];
  1 -> 3 [label=" b"];
  1 -> 4 [label=" c$"];
  2 -> 5 [label="abc$"];
  2 -> 6 [label="c$"];
  3 -> 7 [label=" abc$"];
  3 -> 8 [label="c$"];

  // node 3 should be on the right side of node 2, and
  // a cross line should be drawn horizontally

  2 -> 3 [style=dotted,label="abc$"];

}

问题是，跟随边“abc$”和“b”到达的节点与跟随“ab”和“c$”到达的那两个节点不在同一高度。

有没有人遇到过同样的情况，可以分享一下解决方案吗？

【问题讨论】：

标签： graph graphviz suffix-tree

【解决方案1】：

啊，好吧，没有搜索合适的术语！ "placing nodes on a horizontal line"，提供解决方案。

此代码现在将节点 2、3、4 正确定位在同一“水平线”上。

digraph G {
  1[label = " "];
  2[label = " "];
  3[label = " "];
  4[label = " "];
  5[label = " "];
  6[label = " "];
  7[label = " "];
  8[label = " "];

  node[group=sameheight];
    { rank = same; 2; 3; 4; }

  1 -> 2 [label="ab"];
  1 -> 3 [label=" b"];
  1 -> 4 [label=" c$"];
  2 -> 3 [style=dotted];
  2 -> 5 [label="abc$"];
  2 -> 6 [label="c$"];
  3 -> 7 [label=" abc$"];
  3 -> 8 [label="c$"];
}

希望对某人有所帮助。

【讨论】：