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I want to create the following block matrix enter image description here

So far I have obtain the following matrix

\[
\renewcommand{\arraystretch}{1.3}
\left[
\begin{array}{c@{}c:c:c:c:c:c}
            & \pmb{\Phi}_{1}   & \pmb{\Psi}_{1}   & \mathbf{0}         & \cdots & \mathbf{0}        & \mathbf{0}                   \\ \hdashline
            & \mathbf{0}       & \pmb{\Phi}_{2}   & \pmb{\Psi}_{2}     & \cdots & \mathbf{0}        & \mathbf{0}                    \\ \hdashline
            & \vdots           & \vdots           & \vdots             &        & \vdots            & \vdots                         \\ \hdashline
            & \mathbf{0}       & \mathbf{0}       & \mathbf{0}         & \cdots &  \pmb{\Phi}_{n-1} &  \pmb{\Psi}_{n-1}               \\ \hdashline
            & \mathbf{0}       & \mathbf{0}       & \mathbf{0}         & \cdots &  \mathbf{0}       &  \pmb{\Phi}_{n}               \\
\end{array}\right]
\]

It produces the following matrix enter image description here

How can I achieve that the vertical line are not draw through in the third line like the matrix at the top?

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  • Please consider accepting an answer. Or is your question still open? Commented Dec 30, 2018 at 8:14

3 Answers 3

Reset to default
3

with 

\def\MC#1{\multicolumn{1}{c}{#1}}

and then

\[
\renewcommand{\arraystretch}{1.3}
\left[
\begin{array}{c@{}c:c:c:c:c:c}
    & \pmb{\Phi}_{1}   & \pmb{\Psi}_{1}   & \mathbf{0}         & \cdots & \mathbf{0}        & 
    \mathbf{0}                   \\ \hdashline
    & \mathbf{0}       & \pmb{\Phi}_{2}   & \pmb{\Psi}_{2}     & \cdots & \mathbf{0}        & 
    \mathbf{0}                    \\ \cdashline{1-4}\cdashline{6-7}
    & \MC{\vdots}      & \MC{\vdots}      & \MC{\vdots}        & \MC{}  & \MC{\vdots}       & 
    \vdots                         \\\cdashline{1-4}\cdashline{6-7}
    & \mathbf{0}       & \mathbf{0}       & \mathbf{0}         & \cdots &  \pmb{\Phi}_{n-1} &  
    \pmb{\Psi}_{n-1}               \\ \hdashline
    & \mathbf{0}       & \mathbf{0}       & \mathbf{0}         & \cdots &  \mathbf{0}       &  
    \pmb{\Phi}_{n}               \\
\end{array}\right]
\]

enter image description here

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  • But the second and the third horizontal line are drawn through. This is for the matrix at the top not the case. How can I handle this? Commented Dec 20, 2018 at 20:49
  • see edited answer Commented Dec 21, 2018 at 6:38
2

Like this?

\documentclass{book}
\usepackage{amsbsy}
\usepackage{arydshln}

\begin{document}

\[ \renewcommand{\arraystretch}{1.3}
\left[
\begin{array}{c@{}c:c:c:c:c:c@{}}
   & \boldsymbol{\Phi}_{1} & \boldsymbol{\Psi}_{1} & \mathbf{0} & \cdots & \mathbf{0} & \mathbf{0} \\ \cdashline{1-4}\cdashline{6-7}
    & \mathbf{0} & \boldsymbol{\Phi}_{2} & \boldsymbol{\Psi}_{2} & \cdots & \mathbf{0} & \mathbf{0} \\\cdashline{1-4}\cdashline{6-7}
    & \multicolumn{1}{c}{\vdots} & \multicolumn{1}{c}{\vdots} & \multicolumn{1}{c}{\vdots} &\multicolumn{1} {c}{} & \multicolumn{1}{c}{\vdots} & \vdots \\ \cdashline{1-4}\cdashline{6-7}
    & \mathbf{0} & \mathbf{0} & \mathbf{0} & \cdots &\multicolumn{1}{@{\,}c: }{ \boldsymbol{\Phi}_{n-1}\mkern-6mu} & \mkern-6mu \boldsymbol{\Psi}_{n-1} \\ \cdashline{1-4}\cdashline{6-7}
    & \mathbf{0} & \mathbf{0} & \mathbf{0} & \cdots & \mathbf{0} & \boldsymbol{\Phi}_{n} \\
\end{array}\right]
\]

\end{document}

enter image description here

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4
  • The second and the third horizontal line are drawn through. This is for the matrix at the top not the case. How can I handle this? Commented Dec 20, 2018 at 20:50
  • With \cdashline{...}. Please see the updated code. Commented Dec 20, 2018 at 21:01
  • I can't see the command \cdashline in your code Commented Dec 20, 2018 at 21:08
  • Sorry, a clipboard manager accident. 'Iis fixed now. Commented Dec 20, 2018 at 21:12
1

Here is a solution with {bNiceArray} of nicematrix.

\documentclass{book}
\usepackage{amsbsy}
\usepackage{nicematrix,tikz}

\NiceMatrixOptions
  {
    custom-line = 
     {
       letter = : , 
       command = cdashedline ,
       tikz = dashed 
     }
  }

\begin{document}

\[ \renewcommand{\arraystretch}{1.3}
\begin{bNiceArray}{c:c:c:c:c:c}[margin]
\boldsymbol{\Phi}_{1} & \boldsymbol{\Psi}_{1} & \mathbf{0} & \Block{*-1}{}
                                                             \cdots & \mathbf{0} & \mathbf{0} \\ 
\cdashedline
\mathbf{0} & \boldsymbol{\Phi}_{2} & \boldsymbol{\Psi}_{2} & \cdots & \mathbf{0} & \mathbf{0} \\ 
\cdashedline
\Block{1-*}{}\vdots & \vdots & \vdots & & \vdots & \vdots \\ 
\cdashedline
\mathbf{0} & \mathbf{0} & \mathbf{0} & \cdots & \boldsymbol{\Phi}_{n-1} &  \boldsymbol{\Psi}_{n-1} \\ \cdashedline
\mathbf{0} & \mathbf{0} & \mathbf{0} & \cdots & \mathbf{0} & \boldsymbol{\Phi}_{n} \\
\end{bNiceArray}
\]

\end{document}

Output of the above code

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