367. LaTeX技巧291：怎样绘制分块矩阵的竖虚线

效果图：

演示代码：

\documentclass[11pt]{article}
%\documentclass[11pt]{book}
\usepackage{latexsym}
\usepackage{amsmath}
\usepackage{amssymb}
%\usepackage{graphicx}
%\usepackage{longtable}
%usepackage{colortab}
\usepackage{arydshln}
\newcommand{\adots}{\mathinner{\mkern2mu%
\raisebox{0.1em}{.}\mkern2mu\raisebox{0.4em}{.}%
\mkern2mu\raisebox{0.7em}{.}\mkern1mu}}
\begin{document}
\[
\begin{array}{c@{\hspace{-5pt}}l}
\left(\begin{array}{ccc;{2pt/2pt}ccc}
a 
& \cdots & a & b & \cdots & b \\
& \ddots & \vdots & \vdots & \adots \\
& & a & b \ \\hdashline[2pt/2pt]
& & & c & \cdots & c \\
& & & \vdots & & \vdots \\
\multicolumn{3}{c;{2pt/2pt}}{\raisebox{2ex}[0pt]{\Huge0}}
& c & \cdots & c
\end{array}\right)
& \begin{array}{l}
\left.\rule{0mm}{7mm}\right\}p\\
\\\left.\rule{0mm}{7mm}\right\}q
\end{array}\\[-5pt]
\begin{array}{cc}
\underbrace{\rule{17mm}{0mm}}_m&
\underbrace{\rule{17mm}{0mm}}_n\end{array} &
\end{array}
\]
\end{document}

方法二是

使用宏包pmat，宏包下载地址是： http://www.ctan.org/tex-archive/macros/generic/pmat/

演示效果图：

演示代码如下：

\documentclass[11pt]{article}
%\documentclass[11pt]{book}
\usepackage{latexsym}
\usepackage{amsmath}
\usepackage{amssymb}
%\usepackage{graphicx}
%\usepackage{longtable}
%usepackage{colortab}
\usepackage{pmat}
\usepackage{arydshln}
\newcommand{\adots}{\mathinner{\mkern2mu%
\raisebox{0.1em}{.}\mkern2mu\raisebox{0.4em}{.}%
\mkern2mu\raisebox{0.7em}{.}\mkern1mu}}
\begin{document}
$$
A=\begin{pmat}[{.|.}]
1 & 0 & 0 & 0 \cr
0 & 1 & 0 & 0 \cr\-
-1 & 2 & 1 & 0 \cr
1 & 1 & 0 & 1 \cr
\end{pmat}$$
\[
\pmatset{1}{0.72pt}
\pmatset{0}{2\pmatget{1}}
\pmatset{5}{0pt}
\pmatset{6}{0pt}
\begin{pmat}[{||}]
A_{11} & A_{12} & A_{13} \cr\-
A_{21} & A_{22} & A_{23} \cr\-
A_{31} & A_{32} & A_{33} \cr
\end{pmat}
\]
\end{document}