寸法付きブロック行列方程式

Question

次の行列方程式を LaTex で記述する必要があります。示されている点線は構造内に存在する必要がありますが、色を付ける必要はありません (黒でもかまいません)。ここでは、必要な配置を示すためにのみ使用しています。また、示されているように、さまざまなブロックの寸法を指定する必要があります。最善の方法は何ですか?

Answer 1

matrix of math nodesTikZ と(ライブラリから)を使用してナトリスを構築する可能性matrix。寸法のブレースはライブラリbraceの装飾を使用して構築されましたdecorations.pathreplacing。

\documentclass{article}
\usepackage{tikz}
\usepackage{geometry}
\usetikzlibrary{matrix,positioning,decorations.pathreplacing}

\begin{document}

\begin{tikzpicture}[
style1/.style={
  matrix of math nodes,
  every node/.append style={text width=#1,align=center,minimum height=5ex},
  nodes in empty cells,
  left delimiter=[,
  right delimiter=],
  },
style2/.style={
  matrix of math nodes,
  every node/.append style={text width=#1,align=center,minimum height=5ex},
  nodes in empty cells,
  left delimiter=\lbrace,
  right delimiter=\rbrace,
  }
]
\matrix[style1=0.65cm] (1mat)
{
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
};
\draw[dashed]
  (1mat-3-5.south west) -- (1mat-3-6.south east);
\draw[loosely dashed]
  (1mat-5-1.south west) -- (1mat-5-6.south east);
\draw[dash dot]
  (1mat-1-4.north east) -- (1mat-8-4.south east);
\draw[]
  (1mat-5-2.south east) -- (1mat-8-2.south east);
\node[font=\huge] 
  at ([xshift=-10pt]1mat-3-3) {$A_{1}$};
\node[font=\Large] 
  at (1mat-2-5.east) {$0$};
\node[font=\Large] 
  at (1mat-5-5.north east) {$A_{2}$};
\node[font=\Large] 
  at (1mat-7-5.east) {$B_{2}$};
\node[font=\Large] 
  at (1mat-7-1.east) {$0$};
\node[font=\Large] 
  at (1mat-7-3.east) {$B_{1}$};
\draw[decoration={brace,mirror,raise=12pt},decorate]
  (1mat-1-1.north west) -- 
  node[left=15pt] {$n_{1}$} 
  (1mat-5-1.south west);
\draw[decoration={brace,mirror,raise=12pt},decorate]
  (1mat-6-1.north west) -- 
  node[left=15pt] {$n_{2}$} 
  (1mat-8-1.south west);
\draw[decoration={brace,mirror,raise=5pt},decorate]
  (1mat-8-3.south west) -- 
  node[below=7pt] {$n_{2}$} 
  (1mat-8-4.south east);
\draw[decoration={brace,mirror,raise=5pt},decorate]
  (1mat-8-5.south west) -- 
  node[below=7pt] {$n_{2}$} 
  (1mat-8-6.south east);
\draw[decoration={brace,raise=12pt},decorate]
  (1mat-4-6.north east) -- 
  node[right=15pt] {$n_{2}$} 
  (1mat-5-6.south east);
\draw[decoration={brace,raise=7pt},decorate]
  (1mat-1-1.north west) -- 
  node[above=8pt] {$n_{1}$} 
  (1mat-1-4.north east);

\matrix[style2=1.2cm,right=40pt of 1mat] (2mat)
{
  Q_{1} \\
  \vdots \\
  Q_{n_{1} - n_{2}} \\
  \vdots \\
  Q_{n_{1}} \\
  R_{1} \\
  \vdots \\
  R_{n_{2}} \\
};
\draw[dashed]
  (2mat-3-1.south west) -- (2mat-3-1.south east);
\draw[loosely dashed]
  (2mat-5-1.south west) -- (2mat-5-1.south east);

\node at ([xshift=17pt,yshift=-1.2pt]2mat.east) {$=$};

\matrix[style2=0.7cm,right=35pt of 2mat] (3mat)
{
  0 \\
  \vdots \\
  \\
  \vdots \\
  0 \\
  b_{1} \\
  \vdots \\
  b_{n_{2}} \\
};
\draw[loosely dashed]
  (3mat-5-1.south west) -- (3mat-5-1.south east);
\end{tikzpicture}

\end{document}

情報を表示する別の方法があるかどうかを検討する必要があるかもしれません。寸法を示す中括弧を削除し、単一の破線スタイルを使用すると、結果が改善されます。

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix,positioning,decorations.pathreplacing}

\begin{document}

\[
\begin{tikzpicture}[
style1/.style={
  matrix of math nodes,
  every node/.append style={text width=#1,align=center,minimum height=5ex},
  nodes in empty cells,
  left delimiter=[,
  right delimiter=],
  },
style2/.style={
  matrix of math nodes,
  every node/.append style={text width=#1,align=center,minimum height=5ex},
  nodes in empty cells,
  left delimiter=\lbrace,
  right delimiter=\rbrace,
  }
]
\matrix[style1=0.85cm] (1mat)
{
  & & & & &  \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
  & & & & & \\
};
\draw[dashed]
  (1mat-3-5.south west) -- (1mat-3-6.south east);
\draw[dashed]
  (1mat-6-1.south west) -- (1mat-6-6.south east);
\draw[dashed]
  (1mat-1-4.north east) -- (1mat-9-4.south east);
\draw[dashed]
  (1mat-6-2.south east) -- (1mat-9-2.south east);
\node[font=\huge] 
  at (1mat-3-2.south east) {$A_{1}$};
\node[font=\Large] 
  at (1mat-2-5.east) {$0$};
\node[font=\Large] 
  at (1mat-5-5.east) {$A_{2}$};
\node[font=\Large] 
  at (1mat-8-5.east) {$B_{2}$};
\node[font=\Large] 
  at (1mat-8-1.east) {$0$};
\node[font=\Large] 
  at (1mat-8-3.east) {$B_{1}$};

\matrix[style2=1.2cm,right=40pt of 1mat] (2mat)
{
  Q_{1} \\
  \vdots \\
  Q_{n_{1} - n_{2}} \\
  Q_{n_{1} - n_{2}+1} \\
  \vdots \\
  Q_{n_{1}} \\
  R_{1} \\
  \vdots \\
  R_{n_{2}} \\
};
\draw[dashed]
  (2mat-3-1.south west) -- (2mat-3-1.south east);
\draw[dashed]
  (2mat-6-1.south west) -- (2mat-6-1.south east);

\node at ([xshift=17pt,yshift=-1.2pt]2mat.east) {$=$};

\matrix[style2=0.7cm,right=35pt of 2mat] (3mat)
{
  0 \\
  \vdots \\
  \\
  \\
  \vdots \\
  0 \\
  b_{1} \\
  \vdots \\
  b_{n_{2}} \\
};
\draw[dashed]
  (3mat-6-1.south west) -- (3mat-6-1.south east);
\end{tikzpicture}
\]

\end{document}