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如何划掉 tikz 树中的一条边

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如何划掉 tikz 树中的一条边

我有这棵树：

% Decision tree
% Author: Stefan Kottwitz
% https://www.packtpub.com/hardware-and-creative/latex-cookbook
\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\tikzset{
  treenode/.style = {shape=rectangle, draw},
  dec/.style={shape=rectangle,draw,fill=blue},
  chance/.style={shape=circle,draw,fill=red},
  end/.style={shape=rectangle}
}
\begin{document}
\begin{tikzpicture}
  [
    grow                    = right,
    sibling distance        = 7em,
    level distance          = 12em,
    edge from parent/.style = {draw, -latex},
    every node/.style       = {font=\footnotesize},
    sloped
  ]
  \node [dec] {}
    child { node [chance, label=below:\$3] {} 
      edge from parent node [below] {L} }
    child { node [chance, label=below:\$8] {} 
      child { node [end] {\$8} 
        edge from parent node [above] {HD} } 
      child { node [end] {\$8}
              edge from parent node [above, align=center] {LD} }
              edge from parent node [above] {S} } %comes from root
      child { node [chance, label=below:\$1] {}
        edge from parent node [above] {M} } ;
\end{tikzpicture}
\end{document}

图像目前看起来是这样的：

在此处输入图片描述

我想“双划掉”从蓝色方块到顶部红色圆圈的边缘（即画两条穿过边缘的短线，与边缘垂直）。这两条线应该位于“M”和红色圆圈之间。

我怎样才能在 tikz 中做到这一点？

答案1

再想想，就用两个[strike out]s。

注意，删除线的大小由内容（文字）决定，或者使用[最小宽度]和[最小高度]。

\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes}
\tikzset{
  treenode/.style = {shape=rectangle, draw},
  dec/.style={shape=rectangle,draw,fill=blue},
  chance/.style={shape=circle,draw,fill=red},
  end/.style={shape=rectangle}
}
\begin{document}
\begin{tikzpicture}
  [
    grow                    = right,
    sibling distance        = 7em,
    level distance          = 12em,
    edge from parent/.style = {draw, -latex},
    every node/.style       = {font=\footnotesize},
    sloped
  ]
  \node [dec] (AA){}
    child { node [chance, label=below:\$3] {} 
      edge from parent node [below] {L} }
    child { node [chance, label=below:\$8] {} 
      child { node [end] {\$8} 
        edge from parent node [above] {HD} } 
      child { node [end] {\$8}
              edge from parent node [above, align=center] {LD} }
              edge from parent node [above] {S} } %comes from root
      child { node (BB) [chance, label=below:\$1] {}
        edge from parent node [above] {M} } ;
  \path (AA) -- (BB) node[draw,strike out, pos=0.2] {}
                     node[draw,strike out, pos=0.25] {};
\end{tikzpicture}
\end{document}

演示

此版本创建了一个[double strike]形状。

\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes}
\tikzset{
  treenode/.style = {shape=rectangle, draw},
  dec/.style={shape=rectangle,draw,fill=blue},
  chance/.style={shape=circle,draw,fill=red},
  end/.style={shape=rectangle}
}
\makeatletter
\pgfdeclareshape{double strike}
{%
  \inheritsavedanchors[from=rectangle]% % this is nearly a rectangle
  \inheritanchorborder[from=rectangle]%
  \inheritanchor[from=rectangle]{north}%
  \inheritanchor[from=rectangle]{north west}%
  \inheritanchor[from=rectangle]{north east}%
  \inheritanchor[from=rectangle]{center}%
  \inheritanchor[from=rectangle]{west}%
  \inheritanchor[from=rectangle]{east}%
  \inheritanchor[from=rectangle]{mid}%
  \inheritanchor[from=rectangle]{mid west}%
  \inheritanchor[from=rectangle]{mid east}%
  \inheritanchor[from=rectangle]{base}%
  \inheritanchor[from=rectangle]{base west}%
  \inheritanchor[from=rectangle]{base east}%
  \inheritanchor[from=rectangle]{south}%
  \inheritanchor[from=rectangle]{south west}%
  \inheritanchor[from=rectangle]{south east}%
  \foregroundpath{
    \southwest \pgf@xa=\pgf@x \pgf@ya=\pgf@y
    \northeast \pgf@xb=\pgf@x \pgf@yb=\pgf@y
    \pgfpathmoveto{\southwest}
    \pgfpathlineto{\pgfpoint{0pt}{\pgf@yb}}
    \pgfpathmoveto{\pgfpoint{0pt}{\pgf@ya}}
    \pgfpathlineto{\northeast}
    \pgfsetarrowsstart{}
    \pgfsetarrowsend{}
 }%
}%
\makeatother
\begin{document}
\begin{tikzpicture}
  [
    grow                    = right,
    sibling distance        = 7em,
    level distance          = 12em,
    edge from parent/.style = {draw, -latex},
    every node/.style       = {font=\footnotesize},
    sloped
  ]
  \node [dec] (AA){}
    child { node [chance, label=below:\$3] {} 
      edge from parent node [below] {L} }
    child { node [chance, label=below:\$8] {} 
      child { node [end] {\$8} 
        edge from parent node [above] {HD} } 
      child { node [end] {\$8}
              edge from parent node [above, align=center] {LD} }
              edge from parent node [above] {S} } %comes from root
      child { node (BB) [chance, label=below:\$1] {}
        edge from parent node [above] {M} } ;
  \path (AA) -- (BB) node[draw, double strike, pos=0.25] {};
\end{tikzpicture}
\end{document}

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