使Graphviz边缘标签垂直（或使树水平延伸）

我想实现a）垂直边缘标签或b）水平延伸的树，以便在单个A4页面上适合此图形。我该怎么做

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 = "$"]

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}我在网上发现的一个解决办法是用“\n”（例如换行符）分隔每个字符。它并不漂亮，但基本上实现了垂直边缘标签：

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$"]

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

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一种可能性是使用该实用程序

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$"]

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

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生成的图形不像以前那么宽。

rankdir=LR可以让您将其放在一个页面上

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

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不错。这将以最小的代码更改水平扩展树。