如何将节点放置在neato 图的顶部？

【问题标题】：How do I position a node at the top of a neato diagram?如何将节点放置在neato 图的顶部？
【发布时间】：2017-02-02 22:57:51
【问题描述】：

是否可以强制 graphviz 将 node "a" 放置在此图的顶部？我试过 neato 和 fdp。

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

【问题讨论】：

标签： graphviz dot neato

【解决方案1】：

如果你想使用neato，你可以试试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];
}

【讨论】：