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在投影仪中定位 tikz，使得 (0,0) 在不同幻灯片上位于相同的位置

tag-icon • tag-icon tikz-pgf beamer positioning
在投影仪中定位 tikz，使得 (0,0) 在不同幻灯片上位于相同的位置

我在 Beamer 中有一个演示文稿，其中有几张幻灯片显示了一个带有坐标系的图表。我希望图表（或多或少）位于幻灯片的中心，坐标系的原点位于同一位置。问题是我在坐标系左侧有不同的标签，因此简单的居中不起作用。

最小工作示例：

\documentclass[11pt,usenames,dvipsnames]{beamer}
\usetheme{Boadilla}             
\usepackage{etex}               
\usepackage{color}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}
\usepackage{lmodern}            
\usepackage{tikz}              

\beamertemplatenavigationsymbolsempty %gets rid of navigation at bottom of each slide

\begin{document}
\frame{
    \frametitle{no tax}
    \begin{center}
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis
    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) }; %indifference curve
    \end{tikzpicture}
    \end{center}
    }

    \frame{
    \frametitle{Tax on $y$}
    \begin{center}
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis
    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) };
    \draw[thick]   (0,2) node[left=-1pt] {$\frac{I}{(1+t_y)p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \fill (2,0.85)  circle[radius=1.5pt] node[below left =-1pt] {B}; 
    \draw[thick]   plot[smooth, tension=.7] coordinates {(0.5,2.75) (1,1.75) (1.95,0.9) (2.95,0.5) (3.85,0.4) };
    \end{tikzpicture}
    \end{center}
    }
\end{document}

感谢您的帮助！

答案1

在这种情况下，解决方案比使用绝对定位更简单beamer。由于两个图形大小相似，除了左侧标签外，您可以将这个长标签作为文本包含在第一个图形中\phantom。这种方式不会打印，但会保留相应的空间，两个图形具有相同的宽度，并且都将在相同的幻灯片位置居中。

\documentclass[11pt,usenames,dvipsnames]{beamer}
\usetheme{Boadilla}             
\usepackage{etex}               
\usepackage{color}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}
\usepackage{lmodern}            
\usepackage{tikz}              

\beamertemplatenavigationsymbolsempty %gets rid of navigation at bottom of each slide

\begin{document}
\frame{
    \frametitle{no tax}
    \begin{center}
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis

    %%%%%%%%%% This is new %%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[thick] (0,2) node[left=-1pt] {\phantom{$\frac{I}{(1+t_y)p_y}$}}; %BC

    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) }; %indifference curve
    \end{tikzpicture}
    \end{center}
    }

    \frame{
    \frametitle{Tax on $y$}
    \begin{center}
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis
    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) };
    \draw[thick]   (0,2) node[left=-1pt] {$\frac{I}{(1+t_y)p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \fill (2,0.85)  circle[radius=1.5pt] node[below left =-1pt] {B}; 
    \draw[thick]   plot[smooth, tension=.7] coordinates {(0.5,2.75) (1,1.75) (1.95,0.9) (2.95,0.5) (3.85,0.4) };
    \end{tikzpicture}
    \end{center}
    }
\end{document}

在此处输入图片描述

答案2

此方法在此有效，因为两个图具有相同的右侧极限。具有相同左侧极限的图可以通过消除来处理\llap。但是，如果一个图的左侧和右侧都有多余的东西，则此方法本质上不起作用。

它与atbegshi包一起工作，使用给定的宏在页面上指定的 (x,y) 坐标处的图形上叠加某些内容\atxy{<x>}{<y>}{<content>}。

\documentclass[11pt,usenames,dvipsnames]{beamer}
\usetheme{Boadilla}             
\usepackage{etex}               
\usepackage{color}
\usepackage{amsmath,amssymb}
\usepackage{graphicx}
\usepackage{lmodern}            
\usepackage{tikz}              

\beamertemplatenavigationsymbolsempty %gets rid of navigation at bottom of each 

\usepackage{atbegshi}
\def\PageTopMargin{1in}
\def\PageLeftMargin{1in}
\newcommand\atxy[3]{%
 \AtBeginShipoutNext{\AtBeginShipoutAddToBoxForeground{%
  \smash{\hspace*{\dimexpr-\PageLeftMargin-\hoffset+#1\relax}%
  \raisebox{\dimexpr\PageTopMargin+\voffset-#2\relax}{#3}}}}}
\def\earmark{%
  \atxy{0pt}{\paperheight}{\begin{tikzpicture}
  \node[outer sep=0.46in] (earmark) {};
  \draw[blue!40, fill, opacity=0.25] (earmark.south west) -- (earmark.south east) -- 
    (earmark.north west)-- (earmark.south west);
  \end{tikzpicture}}
}

\begin{document}
\frame{
    \frametitle{no tax}
\atxy{4in}{3.3in}{\llap{%
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis
    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) }; %indifference curve
    \end{tikzpicture}%
}}
    }

    \frame{
    \frametitle{Tax on $y$}
\atxy{4in}{3.3in}{\llap{%
    \begin{tikzpicture}[scale=1.3]
    \draw[->, thick] (-0.2,0) -- (4.2,0) node[right] {$x$}; %x-axis
    \draw[->, thick] (0,-0.2) -- (0,4.2) node[above] {$y$}; %y-axis
    \draw[thick]  (0,3.5) node[left=-1pt] {$\frac{I}{p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \node (v3) at (1.65,1.85) {} ;
    \fill (1.65,1.85)  circle[radius=1.5pt] node[above right=-1pt] {A}; 
    \draw[thick]  plot[smooth, tension=.7] coordinates {(0.85,4) (1,3) (v3) (3,1.15) (4,0.9) };
    \draw[thick]   (0,2) node[left=-1pt] {$\frac{I}{(1+t_y)p_y}$} -- (3.5,0) node[below=-1pt] {$\frac{I}{p_x}$}; %BC
    \fill (2,0.85)  circle[radius=1.5pt] node[below left =-1pt] {B}; 
    \draw[thick]   plot[smooth, tension=.7] coordinates {(0.5,2.75) (1,1.75) (1.95,0.9) (2.95,0.5) (3.85,0.4) };
    \end{tikzpicture}%
}}
    }
\end{document}

在此处输入图片描述

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