![在多行表格旁边绘制一个长箭头](https://linux22.com/image/348491/%E5%9C%A8%E5%A4%9A%E8%A1%8C%E8%A1%A8%E6%A0%BC%E6%97%81%E8%BE%B9%E7%BB%98%E5%88%B6%E4%B8%80%E4%B8%AA%E9%95%BF%E7%AE%AD%E5%A4%B4.png)
我有下表,用于在微积分课上讲授极限(如果您不知道那是什么,请不要担心)
\begin{tabular}{l|l}
\bm{x} & \bm{h(x)} \\
\hline
1.9 & 3.61 \\
1.99 & 3.9601 \\
1.999 & 3.9960 \\
1.9999 & 3.9996 \\
\hline
2.0001 & 4.0004 \\
2.001 & 4.004 \\
2.01 & 4.0401 \\
2.1 & 4.41 \\
\hline
\end{tabular}
在课堂上,我指出左列的数字更接近 2,因为我们通过在第一列的左侧向下画一个箭头来向下画四行,并在其底部写上“2”(但我不能在屏幕上画画)。
我还指出,当我们沿着行向上(在行的左边)绘制一个箭头时,表格下半部分,也就是左侧,会越来越接近 2。
右列越来越接近 4,我通过在右列右侧绘制向下的箭头等来指出这一点(或者如果我可以在屏幕上绘制的话)。
我如何在这些列的右侧或左侧的多行上绘制箭头来显示数字的进展?
答案1
\documentclass{article}
\let\bm\textbf
\usepackage{tikz}
\usetikzlibrary{tikzmark,calc}
\begin{document}
\begin{tabular}{cl|lc}
&\bm{x} & \bm{h(x)} \\
\cline{2-3}
\tikzmark{a}&1.9 & 3.61&\tikzmark{aa} \\
&1.99 & 3.9601& \\
&1.999 & 3.9960 &\\
\tikzmark{b}&1.9999 & 3.9996&\tikzmark{bb} \\
\cline{2-3}
&2.0001 & 4.0004& \\
&2.001 & 4.004 & \\
&2.01 & 4.0401& \\
\tikzmark{c}&2.1 & 4.41&\tikzmark{cc} \\
\cline{2-3}
\end{tabular}
\begin{tikzpicture}[overlay,remember picture]
\draw[->,line width=3pt, color=red] ($(pic cs:a)+(0pt,.5ex)$) to ($(pic cs:b)+(0pt,-.1ex)$);
\node[color=red] at ($(pic cs:b)+(0pt,-1ex)$) {\Large 2};
\draw[->,line width=3pt, color=red] ($(pic cs:c)+(0pt,.5ex)$) to ($(pic cs:b)+(0pt,-2.5ex)$);
\draw[->,line width=3pt, color=red] ($(pic cs:aa)+(0pt,.5ex)$) to ($(pic cs:bb)+(0pt,-.1ex)$);
\node[color=red] at ($(pic cs:bb)+(0pt,-1ex)$) {\Large 4};
\draw[->,line width=3pt, color=red] ($(pic cs:cc)+(0pt,.5ex)$) to ($(pic cs:bb)+(0pt,-2.5ex)$);
\end{tikzpicture}
\end{document}
答案2
如果这是你想要的,那么以下是我的代码,
\documentclass{article}
\usepackage{multirow,tikz,bm}
\def\limitarrow#1{%
\begin{tikzpicture}
\draw[->] (0,1.5) to (0,0.25);
\node at (0,0) {#1};
\draw[->] (0,-1.5) to (0,-0.25);
\end{tikzpicture}}
\begin{document}
\begin{tabular}{l|l|l|l}
& $\bm{x}$ & $\bm{h(x)}$ &\\
\hline
\multirow{8}{*}{\limitarrow{2}} & 1.9 & 3.61 & \multirow{8}{*}{\limitarrow{4}}\\
& 1.99 & 3.9601 & \\
& 1.999 & 3.9960 & \\
& 1.9999 & 3.9996 & \\
\cline{2-3}
& 2.0001 & 4.0004 &\\
& 2.001 & 4.004 &\\
& 2.01 & 4.0401 &\\
& 2.1 & 4.41 &\\
\hline
\end{tabular}
\end{document}