我一直在尝试制作概率树，我认为我几乎已经做得相当不错了，但是向下的垂直线上的标签与线一起倾斜，导致文本旋转了 90 度。所以我的问题是，我是否可以旋转标签，同时选择一些标签使其具有正常方向？
usepackage{tikz}
\usetikzlibrary{trees}
% Define styles for bags and leafs
\tikzstyle{deck} = [text width=4em, text centered]
\tikzstyle{end} = [circle, minimum width=3pt,fill, inner sep=0pt]
% Set the overall layout of the tree
\tikzstyle{level 1}=[level distance=3.5cm, sibling distance=3.5cm]
\tikzstyle{level 2}=[level distance=3.5cm, sibling distance=2cm]
\begin{document}
\begin{tikzpicture}[sloped]
\node[deck] {First card}
child {
node[deck] {Second card}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$\frac{1}{3}$}
node[below] {Q $\spadesuit$}
}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[left] {$\frac{1}{3}$}
node[right] {Q $\heartsuit$}
}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$\frac{1}{3}$}
node[below] {A $\heartsuit$}
}
edge from parent
node[above] {$\frac{1}{4}$}
node[below] {A $\spadesuit$}
}
child {
node[deck] {Second card}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$1$}
node[below] {A $\spadesuit$}
}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$0$}
node[below] {$\neg$A $\spadesuit$}
}
edge from parent
node[above] {$\frac{1}{4}$}
node[below] {A $\heartsuit$}
}
child {
node[deck] {Second card}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$1$}
node[below] {A $\spadesuit$}
}
child {
node[end, label=below: {$\frac{1}{4} \cdot \frac{1}{3}$}] {}
edge from parent
node[above] {$0$}
node[below] {$\neg$A $\spadesuit$}
}
edge from parent
node[above] {$\frac{2}{4}$}
node[below] {$\neg$A}
};
\end{tikzpicture}
\end{document}
任何帮助将非常感激！
答案1
我尝试使用istgame包裹：
\documentclass[tikz]{standalone}
\usepackage{istgame}
\usepackage{makecell}
\def\vcard#1{\makecell{#1}}
\begin{document}
\begin{istgame}
\tikzset{oval node/.style={ellipse node,draw=none}}
\xtdistance{35mm}{45mm}
\istrooto(0){\vcard{First\\card}}
\istB{\frac14}[above,sloped]{A \spadesuit}[below,sloped]
\istB{A \heartsuit}[below,sloped]{\frac14}[right]
\istB{\neg A}[bl]{\frac24}[ar]
\endist
\xtdistance{35mm}{20mm}
\istrooto(1)(0-1){\vcard{Second\\card}}
\istB{\frac13}[above,sloped]{Q \spadesuit}[below,sloped]{\frac14\cdot\frac13}
\istB{\frac13}[left]{Q \heartsuit}[above,sloped]{\frac14\cdot\frac13}
\istB{\frac13}[above,sloped]{A \heartsuit}[below,sloped]{\frac14\cdot\frac13}
\endist
\istrooto(2)(0-2){\vcard{Second\\card}}
\istB{1}[l]{A \spadesuit}[below,sloped]{\frac14\cdot 1}
\istB{0}[r]{\neg A \spadesuit}[below,sloped]{\frac14\cdot 0}
\endist
\istrooto(3)(0-3){\vcard{Second\\card}}
\istB{1}[l]{A \spadesuit}[below,sloped]{\frac14\cdot 1}
\istB{0}[r]{\neg A \spadesuit}[below,sloped]{\frac14\cdot 0}
\endist
\end{istgame}
\end{document}