使Graphviz的边标签垂直（或使树水平展开）

Question

我想要实现垂直边缘标签或者横向扩展的树，以便将这个图形适配在单个A4页面上。您该如何做到呢？

digraph g {
node[shape=point]
root -> 1 [label = "abcdefghijklmnopqrstuvwxyz$"]
root -> 2 [label = "bcdefghijklmnopqrstuvwxyz$"]
root -> 3 [label = "cdefghijklmnopqrstuvwxyz$"]
root -> 4 [label = "defghijklmnopqrstuvwxyz$"]
root -> 5 [label = "efghijklmnopqrstuvwxyz$"]
root -> 6 [label = "fghijklmnopqrstuvwxyz$"]
root -> 7 [label = "ghijklmnopqrstuvwxyz$"]
root -> 8 [label = "hijklmnopqrstuvwxyz$"]
root -> 9 [label = "ijklmnopqrstuvwxyz$"]
root -> 10 [label = "jklmnopqrstuvwxyz$"]
root -> 11 [label = "klmnopqrstuvwxyz$"]
root -> 12 [label = "lmnopqrstuvwxyz$"]
root -> 13 [label = "mnopqrstuvwxyz$"]
root -> 14 [label = "nopqrstuvwxyz$"]
root -> 15 [label = "opqrstuvwxyz$"]
root -> 16 [label = "pqrstuvwxyz$"]
root -> 17 [label = "qrstuvwxyz$"]
root -> 18 [label = "rstuvwxyz$"]
root -> 19 [label = "stuvwxyz$"]
root -> 20 [label = "tuvwxyz$"]
root -> 21 [label = "uvwxyz$"]
root -> 22 [label = "vwxyz$"]
root -> 23 [label = "wxyz$"]
root -> 24 [label = "xyz$"]
root -> 25 [label = "yz$"]
root -> 26 [label = "z$"]
root -> 27 [label = "$"]

}

- HorseloverFat

Answer 1

"rankdir=LR" 可以让你将它适配在一页上。

digraph g {
graph[rankdir=LR]
node[shape=point]
root -> 1 [label = "abcdefghijklmnopqrstuvwxyz$"]
root -> 2 [label = "bcdefghijklmnopqrstuvwxyz$"]
...
}

http://www.graphviz.org/doc/info/attrs.html#d:rankdir

- Rick

---

不错。这通过最小的代码更改在水平方向上扩展了树。 - HorseloverFat

Answer 2

我在网上发现的一个解决方法是使用 '\n'（即换行符）将每个字符分开。虽然不太美观，但基本上可以实现垂直边缘标签：

例如：

root -> 1 [label = "f\ng\nh\ni\nj\nk\nl\nm\nn\no\np\nq\nr\ns\nt\nu\nv\nw\nx\ny\nz\n$"]

- HorseloverFat

Answer 3

一个可能的方法是使用 unflatten 工具。

例如：

unflatten -l 8 yourdotfile.gv | dot | neato -s -n2 -Tpng -o result.png

生成的图形不如以前宽。

- marapet