☰

在投影机上显示概率树

tag-icon • tag-icon beamer formatting
在投影机上显示概率树

我想在这里修改代码：

http://www.texample.net/tikz/examples/scenario-tree/

以便使其适合 beamer 页面。代码在常规文章页面上有效，但树对于 beamer 幻灯片来说太大了。我应该在代码中更改什么才能将树放在一张幻灯片上？

非常感谢您的帮助！

答案1

如果您不介意scale原始树，那么您有两个简单的解决方案。

第一：使用standalone该类生成一棵裁剪的树，该树将通过命令包含在您的投影仪演示文稿中\includegraphics。

用更改minimal类standalone并将其转换为 pdflatex。您不需要更改任何其他内容。

% Scenario tree
% Author: Rasmus Pank Roulund
% \documentclass{minimal}
\documentclass[border=2mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes}
\usepackage{amsmath}
\usepackage{xspace}
\newcommand{\A}{\ensuremath{\mathcal{A}}\xspace}
\newcommand{\B}{\ensuremath{\mathcal{B}}\xspace}
\newcommand\pa[1]{\ensuremath{\left(#1\right)}}
\begin{document}
\begin{tikzpicture}[
    grow=right,
    level 1/.style={sibling distance=3.5cm,level distance=5.2cm},
    level 2/.style={sibling distance=3.5cm, level distance=6.7cm},
    edge from parent/.style={very thick,draw=blue!40!black!60,
        shorten >=5pt, shorten <=5pt},
    edge from parent path={(\tikzparentnode.east) -- (\tikzchildnode.west)},
    kant/.style={text width=2cm, text centered, sloped},
    every node/.style={text ragged, inner sep=2mm},
    punkt/.style={rectangle, rounded corners, shade, top color=white,
    bottom color=blue!50!black!20, draw=blue!40!black!60, very
    thick }
    ]

\node[punkt, text width=5.5em] {Country~\B}
    %Lower part lv1
    child {
        node[punkt] [rectangle split, rectangle split, rectangle split parts=3,
         text ragged] {
            \textbf{Scenario  1}
                  \nodepart{second}
            $\text{Country \B}\colon    s\bar{Q}$
                  \nodepart{third}
            $\text{Country \A}\colon\pa{1-s}\bar{Q}$
        }
        edge from parent
            node[kant, below, pos=.6] {Unchanged parity}
    }
    %Upper part, lv1
    child {
        node[punkt, text width=6em] {Country~\A}
        %child 1
        child {
            node [punkt,rectangle split, rectangle split,
            rectangle split parts=3] {
                \textbf{Scenario  2}
                \nodepart{second}
                $\text{Country \B}\colon s\bar{Q}+2\alpha\Delta E -sc$
                \nodepart{third}
                $\text{Country \A}\colon\pa{1-s}\bar{Q}-\alpha\Delta E -
                \pa{1-s}c$
            }
            edge from parent
                node[below, kant,  pos=.6] {Unchanged parity}
        }
        %child 2
        child {
            node [punkt, rectangle split, rectangle split parts=3]{
                \textbf{Scenario 3}
                \nodepart{second}
                $\text{Country \B}\colon s\bar{Q}-2sc$
                \nodepart{third}
                $\text{Country \A}\colon\pa{1-s}\bar{Q}-2\pa{1-s}c$
            }
            edge from parent
                node[kant, above] {Devalues}}
            edge from parent{
                node[kant, above] {Devalues}}
    };
\end{tikzpicture}
\end{document}

现在，将其包含在您的演示文稿中。

\documentclass{beamer}

\begin{document}

\begin{frame}{Probability tree}

{\par\centering
% 106998 is the name I've used for probability tree figure.
\includegraphics[width=\linewidth]{106998}
\par}
\end{frame}
\end{document}

结果是：

在此处输入图片描述

第二：Tikz在投影仪演示文稿中包含代码，但使用\resizebox命令调整其大小：

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{shapes}
\usepackage{amsmath}
\usepackage{xspace}
\newcommand{\A}{\ensuremath{\mathcal{A}}\xspace}
\newcommand{\B}{\ensuremath{\mathcal{B}}\xspace}
\newcommand\pa[1]{\ensuremath{\left(#1\right)}}
\begin{document}

\begin{frame}{Probability tree}

{\par\centering\resizebox{\linewidth}{!}{%
\begin{tikzpicture}[
    grow=right,
    level 1/.style={sibling distance=3.5cm,level distance=5.2cm},
    level 2/.style={sibling distance=3.5cm, level distance=6.7cm},
    edge from parent/.style={very thick,draw=blue!40!black!60,
        shorten >=5pt, shorten <=5pt},
    edge from parent path={(\tikzparentnode.east) -- (\tikzchildnode.west)},
    kant/.style={text width=2cm, text centered, sloped},
    every node/.style={text ragged, inner sep=2mm},
    punkt/.style={rectangle, rounded corners, shade, top color=white,
    bottom color=blue!50!black!20, draw=blue!40!black!60, very
    thick }
    ]

\node[punkt, text width=5.5em] {Country~\B}
    %Lower part lv1
    child {
        node[punkt] [rectangle split, rectangle split, rectangle split parts=3,
         text ragged] {
            \textbf{Scenario  1}
                  \nodepart{second}
            $\text{Country \B}\colon    s\bar{Q}$
                  \nodepart{third}
            $\text{Country \A}\colon\pa{1-s}\bar{Q}$
        }
        edge from parent
            node[kant, below, pos=.6] {Unchanged parity}
    }
    %Upper part, lv1
    child {
        node[punkt, text width=6em] {Country~\A}
        %child 1
        child {
            node [punkt,rectangle split, rectangle split,
            rectangle split parts=3] {
                \textbf{Scenario  2}
                \nodepart{second}
                $\text{Country \B}\colon s\bar{Q}+2\alpha\Delta E -sc$
                \nodepart{third}
                $\text{Country \A}\colon\pa{1-s}\bar{Q}-\alpha\Delta E -
                \pa{1-s}c$
            }
            edge from parent
                node[below, kant,  pos=.6] {Unchanged parity}
        }
        %child 2
        child {
            node [punkt, rectangle split, rectangle split parts=3]{
                \textbf{Scenario 3}
                \nodepart{second}
                $\text{Country \B}\colon s\bar{Q}-2sc$
                \nodepart{third}
                $\text{Country \A}\colon\pa{1-s}\bar{Q}-2\pa{1-s}c$
            }
            edge from parent
                node[kant, above] {Devalues}}
            edge from parent{
                node[kant, above] {Devalues}}
    };
\end{tikzpicture}}
\par}
\end{frame}
\end{document}

第三个选项是更改树以适应投影仪幻灯片，但这并不容易。一些值得探索的想法：使其向下生长，更改字体大小，...

相关内容