layout - Graphviz Selfloops 重叠标签

Question

我有一个简单的 graphiz 图，我试图用点渲染。它是单个状态上的一系列自循环:

digraph FST {
size = "8.5,11";
label = "";
rankdir=LR;
bgcolor = "transparent";
center = 1;
rank = same;
margin = 0;
orientation = Portrait;
0 [label = "0", shape = doublecircle, style = bold, fontsize = 14, color="#339933"]
    0 -> 0 [label = "a", fontsize = 14];
    0 -> 0 [label = "b", fontsize = 14];
    0 -> 0 [label = "cd", fontsize = 14];
    0 -> 0 [label = "efg", fontsize = 14];
    0 -> 0 [label = "a", fontsize = 14];
    0 -> 0 [label = "q", fontsize = 14];
    0 -> 0 [label = "xyzabc", fontsize = 14];
}

我这样编译:

 $ cat self-loop.dot | dot -Tpng > self-loop.png

然而，边缘与标签重叠，看起来很荒谬。有什么方法可以防止边缘这样做吗？为了让他们更加火爆？

Resulting Graph

我没有运气搜索论坛或graphviz文档。

Answer 1

多循环是一种痛苦。使用端口 ( https://www.graphviz.org/doc/info/attrs.html#k:portPos ) 会有所帮助。 Bur rankdir 也有问题，所以我改了。

digraph FST {
size = "8.5,11";
label = "";
//rankdir=LR;  // note the change in rankdir!!
bgcolor = "transparent";
center = 1;
rank = same;
margin = 0;
orientation = Portrait;
0 [label = "0", shape = doublecircle, style = bold, fontsize = 14, color="#339933"]
    0:nw -> 0:ne [label = "a", fontsize = 14];
    0:nw -> 0:ne [label = "\nb", fontsize = 14];
    0:nw -> 0:ne [label = "\ncd", fontsize = 14];
    0:nw -> 0:ne [label = "\nefg  ", fontsize = 14];
    0:nw -> 0:ne [label = "  a  ", fontsize = 14];
    0:nw -> 0:ne [label = "  q  ", fontsize = 14];
    0:nw -> 0:ne [label = "xyzabc", fontsize = 14];
}

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