请帮我在 beamer 类中制作 tikz 图片

Question

我有一张 tikz 图片。它在我的论文文件中运行顺利。但是当我把它放到框架中时，它出错了，请帮帮我。

这是我的代码：

\documentclass{beamer}
\usepackage{graphicx}
\usepackage[labelsep=quad,indention=10pt]{subfig}
\usepackage{tikz}
\begin{document}

\frame{
\begin{figure}[ht]
\centering
  \begin{tikzpicture}[
init/.style={
  draw,
  circle,
  inner sep=2pt,
  font=\Huge,
  join = by -latex
},
squa/.style={
  draw,
  inner sep=2pt,
  font=\Large,
  join = by -latex
},
start chain=2,node distance=13mm
]
\node[on chain=2] 
  (x2) {$x_2$};
\node[on chain=2,join=by o-latex] 
  {$w_2$};
\node[on chain=2,init] (sigma) 
  {$\displaystyle\Sigma$};
\node[on chain=2,squa,label=above:{\parbox{2cm}{\centering Activate \\ function}}]   
  {$f$};
\node[on chain=2,label=above:Output,join=by -latex] 
  {$y$};
\begin{scope}[start chain=1]
\node[on chain=1] at (0,1.5cm) 
  (x1) {$x_1$};
\node[on chain=1,join=by o-latex] 
  (w1) {$w_1$};
\end{scope}
\begin{scope}[start chain=3]
\node[on chain=3] at (0,-1.5cm) 
  (x3) {$x_3$};
\node[on chain=3,label=below:Weights,join=by o-latex] 
  (w3) {$w_3$};
\end{scope}
\node[label=above:\parbox{2cm}{\centering Bias \\ $b$}] at (sigma|-w1) (b) {};

\draw[-latex] (w1) -- (sigma);
\draw[-latex] (w3) -- (sigma);
\draw[o-latex] (b) -- (sigma);

\draw[decorate,decoration={brace,mirror}] (x1.north west) -- node[left=10pt] {Inputs} (x3.south west);
\end{tikzpicture}
\end{figure}
}
\end{document}

Answer 1

您忘记加载适当的 TikZ 库。添加

\usetikzlibrary{chains,arrows,decorations.pathreplacing}

到序言部分，代码就可以编译了。

如果你想扩展tikzpicture，你可以添加选项

transform shape,scale=<factor>,

对tikzpicture环境的影响。例如，

\begin{tikzpicture}[
  transform shape,scale=.5,
  <other options>
]
  <drawing commands>
\end{tikzpicture}

将产生以下结果：