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Question

如何创建图形的调节器部分（箭头指向其他箭头、间距、所有 X 箭头位于 Y 左侧）？

感谢您。

Answer 1

欢迎！我推荐forest这个。

\documentclass{article}
\usepackage[edges]{forest}
\begin{document}
\begin{forest}
for tree={grow=180,
  edge={semithick,stealth-},math content,l sep=10em,draw}
 [y,minimum width=1.2cm,minimum height=0.8cm
  [x_1,edge label={coordinate[pos=0.8](a)}]
  [x_2]
  [x_3]
  [x_4]
  [x_5]
  [x_6,edge label={coordinate[pos=0.2](b)}]
 ]
\path (a) -- (b) coordinate[midway] (c);
\node[draw] at ([yshift=1em]current bounding box.north-|c) (m) {Moderator};
\draw[semithick,-stealth] (m) -- (a);
\draw[semithick,-stealth] (m) -- (b);
\end{forest}
\end{document}

这是一种向树中添加一个普通文本的可能方法。

\documentclass{article}
\usepackage[edges]{forest}
\usepackage{amsmath}
\begin{document}
\begin{forest}
for tree={grow=180,
  edge={semithick,stealth-},math content,l sep=10em,draw,
  where n children=0{anchor=east}{},child anchor=east}
 [y,minimum width=1.2cm,minimum height=0.8cm
  [\text{Gym instructor},edge label={coordinate[pos=0.8](a)}]
  [x_2]
  [x_3]
  [x_4]
  [x_5]
  [x_6,edge label={coordinate[pos=0.2](b)}]
 ]
\path (a) -- (b) coordinate[midway] (c);
\node[draw] at ([yshift=1em]current bounding box.north-|c) (m) {Moderator};
\draw[semithick,-stealth] (m) -- (a);
\draw[semithick,-stealth] (m) -- (b);
\end{forest}
\end{document}

如果树主要是非数学内容，请math content从选项中删除for tree，并在适当的地方添加$符号。