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如何绘制一个条形图（一个高度非常小的填充矩形，就像“线”形状的节点）？

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如何绘制一个条形图（一个高度非常小的填充矩形，就像“线”形状的节点）？

我现在对 Petri 网的印象是 以下

问题：'条'（灰色）太高，尽管minimum height=0.1mm（似乎没有任何效果）。是否可以将这些灰色矩形变得更薄？

代码是（不需要阅读全部内容，只需查看两条注释）：

\documentclass[11pt]{article}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,automata,positioning,calc,patterns,petri}

\begin{document}
\begin{tikzpicture}[node distance=1.3cm,>=stealth',bend angle=45,auto]

\tikzstyle{place}=[circle,thick,draw=blue!75,fill=blue!20,minimum size=6mm]
\tikzstyle{red place}=[place,draw=red!75,fill=red!20]
\tikzstyle{transition}=[rectangle,  % <------Can we make them thinner?
          thick,     
          draw=black!75,
          fill=black!25,
          minimum height=0.1mm,     %<------------------ this doesn't help
          minimum width=8mm,
          rounded corners]

\tikzstyle{every label}=[red]

\node [place,tokens=1] (start)                    {$start$};
\node [transition] (start_to_start_q0) [below left of=start] {};
\node [transition] (start_to_q0_ok) [below right of=start] {};

\node [place]          (q0)     [below of=start_to_start_q0]  {$q_0$};
\node [place]          (ok)     [below of=start_to_q0_ok]     {$ok$};

\node [place] (q) [below left of=q0]             {$q$};
\node [transition] (from_q_ok) [below right of=q] {};

\node [place] (qsa) [below left of=from_q_ok]           {$q_{a!!}$};
\node [place] (a) [right of=qsa]                    {$a$};
\node [transition] (from_qsa_a) [below right of=qsa] {};

\node [place] (p) [right of=a]                    {$p$};
\node [transition] (from_a_p) [below right of=a] {};

\node [place] (qend) [below of=from_qsa_a]             {$q'$};

\node [place] (pra) [below of=from_a_p]             {$p_{a??}$};
\node [transition] (from_ok_pra) [right of=pra] {};
\node [place] (pend) [right of=from_ok_pra]             {$p'$};

\path (start_to_start_q0)
  edge [pre,bend right]                (start)
  edge [post]                          (start)
  edge [post]                          (q0);

\path (start_to_q0_ok)
  edge [pre]                           (start)
  edge [post]                          (q0)
  edge [post]                          (ok);

\path (from_q_ok)
  edge [pre]                          (q)
  edge [pre]                          (ok)
  edge [post]                         (qsa)
  edge [post]                         (a);

\path (from_qsa_a)
  edge [pre]                          (qsa)
  edge [pre]                          (a)
  edge [post]                         (qend)
  edge [post]                         (ok);

\path (from_a_p)
  edge [pre]                          (a)
  edge [pre]                          (p)
  edge [post]                         (pra)
  edge [post]                         (a);

\path (from_ok_pra)
  edge [pre]                          (ok)
  edge [pre]                          (pra)
  edge [post]                         (ok)
  edge [post]                         (pend);    

\end{tikzpicture}

\end{document}

答案1

节点inner sep选项是节点填充，用于确保节点文本和节点边框之间的空间。通过将其设置为零，您可以根据minimum height需要控制节点高度。

此代码：

\tikzstyle{transition}=[rectangle,
          thick,     
          draw=black!75,
          fill=black!25,
          minimum height=1mm,
          minimum width=8mm,
          rounded corners,
          inner sep=0]

1 毫米节点

节点高度为 1 毫米，但圆角现在看起来很奇怪。也许这是另一个问题。

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