表格内的矩阵

Question

我正在尝试将 2x2 矩阵与数字一起放入表格中。错误源自矩阵部分。如果您能帮助我，我将不胜感激。

\documentclass{standalone}  
\usepackage{amsmath}
\usepackage{setspace} \doublespacing
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{booktabs, makecell, multirow,}
\usepackage[export]{adjustbox}

\begin{document}
\begin{tabular}{ccc}
\toprule
\textbf{A}     &   \textbf{B}  &   \textbf{C}  \\
\midrule  

$\begin{pmatrix}  \ast & \ast \\ \ast &  \ast \end{pmatrix}$ 
&
$\begin{pmatrix}  \ast & \ast \\ \ast &  \ast \end{pmatrix}$
&
$\begin{pmatrix}  \ast & \ast \\ \ast &  \ast \end{pmatrix}$

\midrule
\includegraphics[width=30mm,height=15mm,valign=m]{example-image-a}  &  
\includegraphics[width=30mm,height=15mm,valign=m]{example-image-a} & 
\includegraphics[width=30mm,height=15mm,valign=m]{example-image-a}  
\end{tabular}
\end{document} 

Answer 1

您的错误仅仅是缺少\\之前的内容\midrule，与矩阵无关。