graphviz - 如何将节点放置在neato 图的顶部？

Question

是否可以强制 graphviz 将节点“a”放在该图的顶部？我已经尝试过neoto和fdp。

digraph G {
    "a";
    "b";
    "c";
    "d";
    "e";
    "a" -> "b";
    "a" -> "d";
    "a" -> "a";
    "b" -> "c";
    "c" -> "d";
    "d" -> "e";
    "e" -> "a";
}

Answer 1

如果你想使用neato，你可以试试这个pos属性：

digraph G {
    "a" [pos="0,2!"];
    "b";
    "c";
    "d";
    "e";
    "a" -> "b";
    "a" -> "d";
    "a" -> "a";
    "b" -> "c";
    "c" -> "d";
    "d" -> "e";
    "e" -> "a";
}

使用dot布局时，您可以切换边缘的方向以确保a保持在顶部：

digraph G {
    "a";
    "b";
    "c";
    "d";
    "e";
    "a" -> "b";
    "a" -> "d";
    "a" -> "a";
    "b" -> "c";
    "c" -> "d";
    "d" -> "e";
    "a" -> "e" [dir=back];
}