凌乱的块矩阵

Question

我需要排版以下矩阵

但我不太理解 nicematrix 包。我试着这样写

    \begin{document}
    \begin{align*}
    \begin{pNiceArray}{cccc|ccc}
      \Block{2-2}<\Large>{\mathbf{S}}  & \Block{2-2}<\Large>{\mathbf{0}}  \\
      0 & A & -A & 0 \\
      \hline
      \Block{2-2}<\Large>{\mathbf{0}} && A & 0 & A
    \end{pNiceArray}
    \end{align*}
    \end{document}
If you can give me any help I'll be grateful.

Answer 1

这是一个array基于的解决方案。

\documentclass{article} 
\usepackage{array}     % for '\extrarowheight' macro
\usepackage{multirow}  % for '\multirow' macro

\begin{document}

\begingroup % localize scope of the next instruction
\Large % '\Large' is a textmode command
\[
\setlength\extrarowheight{2pt}
\left( \begin{array}{ l | c | c | c }
S & -A & \multicolumn{2}{c}{0} \\
\hline
\multirow{2.1}{*}{0} &  A & -A &  0 \\
\cline{2-4}
 & A & 0 & -A 
\end{array} \right)
\]
\endgroup

\end{document}

Answer 2

这里有一个使用的可能性nicematrix。该选项hvlines创建水平和垂直规则并尊重块。

\documentclass{article}

\usepackage{nicematrix}

\begin{document}

\[
\begin{pNiceMatrix}[hvlines]
S & -A & \Block{1-2}{0} &\\
\Block{2-1}{0} & A & -A & 0\\
& A & 0 & -A
\end{pNiceMatrix}
\]

\end{document}