改变点的边缘方向 [英] Changing edge direction in dot

问题描述

我正在尝试在点图中绘制一个非常简单的图.

I'm trying to draw a pretty simple diagram in dot.

digraph untitled
    {
    rankdir = LR;
    {rank=same; S; A}
    B -> A;
    B -> S;
    A -> A;
    S -> S;
    A -> S ;
    S -> A;
    A -> T;
    S -> T;
}

我得到的结果是

我确实必须从S -> S更改边缘，但是我还想更改箭头的方向，以便它们从左到右循环.

I really have to change the edge from S -> S, but I would also like to change the orientation of the arrows so they loop from left to right.

推荐答案

要更改任何箭头的方向，您可以简单地使用dir=back:

To change the orientation of any arrow, you may simply use dir=back:

S -> S [dir=back];

但是在您的情况下，这似乎没有必要...(请参阅下文)

But in your case this doesn't seem to be necessary... (see below)

由于边缘S -> S与A -> S和S -> A边缘之间存在重叠，我建议仅在S和A之间使用一条边缘，两端都带有箭头:

Because of the overlap between the edge S -> S and the A -> S and S -> A edges, I suggest to use only one edge between S and A with an arrowhead on both ends:

digraph g {
    rankdir = LR;
    {rank=same; S; A}
    B -> A -> T;
    B -> S -> T;
    A -> A;
    S -> S;
    A -> S[dir=both];
}

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