节点的xlabel与点的边缘重叠 [英] xlabels for nodes overlap with edges in dot

问题描述

我尝试使用点来绘制图形，但是我遇到以下问题

I try to use dot for drawing a graph, and I have the following problem

节点b的标签与a到b的边缘重叠.有没有办法以某种方式移动此标签来避免这种情况?

The label for node b overlaps with the edge from a to b. Is there a way to move this label somehow to avoid this?

这是我用来生成图像的代码(使用dot)

This is the code I use to generate the image (using dot)

digraph A {
  rankdir=LR;
  center=true; margin=0.3; 
  nodesep=1.5; ranksep=0.5;

  node [shape=point,  height=".2", width=".2"];

  a [xlabel="a"];
  b [xlabel="b"];
  c [xlabel="c"];
  a -> b -> c;
  a -> c;
}

这种情况经常发生，而且很烦人(这里也一样，但是带有边缘):

This happens quite often and it's annoying (same here, but with edges):

我知道这是由于xlabel放在所有东西都摆好之后而造成的，但是我想知道是否有可能对它有所帮助-即说出需要放置标签的地方.

I understand that this is caused by the fact that xlabels are put after all the things were laid out, but I was wondering if it's possible to help it a bit - i.e. say it where the label needs to be placed.

推荐答案

您无法执行此操作-您想提供xlabel的位置信息，但是graphviz当前(2016-01-25)不允许这样做. graphviz错误跟踪器中有一个打开功能请求为了这个能力；它描述为:

You can't do this -- you want to provide position information for the xlabel, but graphviz does not currently (2016-01-25) allow this. There is an open feature request in the graphviz bug tracker for this ability; it is described as:

这基本上是一个功能请求，用于允许用户提供xlabel的位置信息.对于附加到节点的xlabel，坐标应相对于节点位置.类似的功能可能适用于边缘的头和尾标签.我想边缘的xlabel可以基于边缘的中心".

this is basically a feature request for allowing the user to provide position information for xlabels. For xlabels attached to nodes, the coordinates should be relative to the node position. A similar feature could hold for head and tail labels for edges. I suppose xlabels for edges could be based on the "center" of the edge.

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