对齐节点，使标签保持边缘

Question

我有以下模型：

strict digraph graphName {
  rankdir="LR";
  splines="curved";

  age -> intention [label="-"];
  attitude -> intention [label="+"];
  education -> intention [label="+"];
  env_friendly -> intention [label="+"];
  knowledge -> intention [label="+"];
  male
  negative -> intention [label="-"];
  neutral
  positive -> intention [label="+"];
  unsafe -> intention [label="-"];

  positive -> env_friendly [dir="both", label="+"];

  { rank = same; age; attitude; education; env_friendly; knowledge; male; negative; neutral; positive; unsafe; }
}

这将显示OK，但是边缘标签关闭，并且双箭头进入节点而不是节点边缘。我该怎么做才能使标签随节点一起返回？

Answer 1

只需删除行splines = "curved";即可得到（我想）您想要的：

strict digraph graphName {
  rankdir="LR";
  # splines="curved";

  age -> intention [label="-"];
  attitude -> intention [label="+"];
  education -> intention [label="+"];
  env_friendly -> intention [label="+"];
  knowledge -> intention [label="+"];
  male
  negative -> intention [label="-"];
  neutral
  positive -> intention [label="+"];
  unsafe -> intention [label="-"];

  positive -> env_friendly [dir="both", label="+"];

  { rank = same; age; attitude; education; env_friendly; knowledge; male; negative; neutral; positive; unsafe; }
}

收益

提示来自graphviz的警告

  

警告：点中不支持带有样条曲线=曲线的边缘标签-请使用xlabels

但关键是不使用xlabels，而是不使用splines。