在 TikZ 中绘制图表

Question

我想用 Ti 绘制如下方案钾Z：

Answer 1

这只是展示一种无需明确坐标即可完成此操作的方法。我将两个方程式添加到同一个节点中，并将箭头放置在相对于此节点的角的位置。

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{calc}
\begin{document}

\begin{tikzpicture}[MyArrow/.style={-latex,shorten >= 0.1cm,shorten <=0.1cm,thick}]
\node (eq) [draw, inner sep=10pt,align=center] {$(a+b)^2=a^2+2ab+b^2$ \\[1ex]
                                                $(a-b)^2=a^2-2ab+b^2$};

\draw [MyArrow] ($(eq.north west)!0.2!(eq.north east)$) -- ++(0,0.5) -| node[pos=0.25,fill=white,draw] {word}  ($(eq.north west)!0.8!(eq.north east)$);

\draw [MyArrow] ($(eq.south east)!0.2!(eq.south west)$) -- ++(0,-0.5) -| node[pos=0.25,fill=white,draw] {word}  ($(eq.south east)!0.8!(eq.south west)$);
\end{tikzpicture}


\end{document}

Answer 2

您可以在使用环境命令的地方使用\draw此\path代码tikzpicture：

% Document
\begin{document}

\begin{tikzpicture}
% Formulas
 \path (0,.25)    node{$(a+b)^2=a^2+2ab+b^2$} --
       (0,-.25)   node{$(a-b)^2=a^2-2ab+b^2$} --
       (-.5,1.3)  node{word}                  --
       (-.5,-1.3) node{word}                 ;
% Rectangle
 \draw[thick] (-2.2,-.7) rectangle (2.2,.7);
 \draw[thick] (-1,.9)    rectangle (0,1.7) ;
 \draw[thick] (-1,-.9)   rectangle (0,-1.7);
% Lines
 \draw[thick]    (-1.5,.7)  -- (-1.5,1.3)  -- (-1,1.3) ;
 \draw[thick,->] (0,1.3)    -- (1,1.3)     -- (1,.7)   ;
 \draw[thick]    (-1.5,-.7) -- (-1.5,-1.3) -- (-1,-1.3);
 \draw[thick,->] (0,-1.3)   -- (1,-1.3)    -- (1,-.7)  ;
\end{tikzpicture}

\end{document}

要获得此图：