如何 xshift tikzmark 并保留矩阵中的行间距

Question

我正在尝试使用\tikzmark命令将带有标签的右括号覆盖在 旁边pmatrix。不幸的是，当前输出存在两个问题：

1. 我的代码在矩阵的行之间引入了额外的垂直空间。我该如何解决这个问题？
2. 我想将支架向右移动几毫米。我该怎么做？

我的代码和输出如下所示。

\documentclass[12pt]{article}

\usepackage{amsmath}
\usepackage{tikz}

\newcommand\tikzmarkeast[2][]{\tikz[remember picture,baseline=(#1.east)]
\node[inner sep=0,outer sep=0](#1){#2};}

\begin{document}
\[
\begin{pmatrix}
1 & 1 & 1 &   &   &   &   &   &   \\
  &   &   & 1 & 1 & 1 &   &   &   \\
  &   &   &   &   &   & 1 & 1 & 1 \\
  & 1 & 1 &   & 1 & 1 &   &   &   \\
  &   &   &   & 1 & 1 &   & 1 & 1 \\
  & 1 & 1 &   & 1 & 1 &   & 1 & 1
\end{pmatrix}
\begin{pmatrix}
  \gamma_1^0 \\ \gamma_1^1 \\ \gamma_1^2 \\
  \gamma_2^0 \\ \gamma_2^1 \\ \gamma_2^2 \\
  \gamma_3^0 \\ \gamma_3^1 \\ \gamma_3^2
\end{pmatrix}
\leq
  \begin{pmatrix}
    \tikzmarkeast[select-1]{1} \\ 1 \\ \tikzmarkeast[select-2]{1} \\
    1 \\ 1 \\
    L
  \end{pmatrix}
%
\tikz[remember picture,overlay]
\draw[decorate,decoration={brace,amplitude=3pt},xshift=6mm]
  (select-1.north east)
  -- node[right=3pt]{$\sum \gamma_t^k \leq 1$}
  (select-2.south east);
\]
\end{document}

Answer 1

你的问题是baseline=(#1.east)。应该是baseline=(#1.base)。此外，你可以xshift在坐标中输入

\tikz[remember picture,overlay]
\draw[decorate,decoration={brace,amplitude=3pt},]
  ([xshift=6mm]select-1.north east)
  -- node[right=3pt]{$\sum \gamma_t^k \leq 1$}
  ([xshift=6mm]select-2.south east);

完整代码：

\documentclass[12pt]{article}

\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{decorations.pathreplacing}

\newcommand\tikzmarkeast[2][]{\tikz[remember picture,baseline=(#1.base)]\node[inner sep=0,outer sep=0](#1){#2};}%

\begin{document}
\[
\begin{pmatrix}
1 & 1 & 1 &   &   &   &   &   &   \\
  &   &   & 1 & 1 & 1 &   &   &   \\
  &   &   &   &   &   & 1 & 1 & 1 \\
  & 1 & 1 &   & 1 & 1 &   &   &   \\
  &   &   &   & 1 & 1 &   & 1 & 1 \\
  & 1 & 1 &   & 1 & 1 &   & 1 & 1
\end{pmatrix}
\begin{pmatrix}
  \gamma_1^0 \\ \gamma_1^1 \\ \gamma_1^2 \\
  \gamma_2^0 \\ \gamma_2^1 \\ \gamma_2^2 \\
  \gamma_3^0 \\ \gamma_3^1 \\ \gamma_3^2
\end{pmatrix}
\leq
  \begin{pmatrix}
    \tikzmarkeast[select-1]{1} \\
     1 \\ \tikzmarkeast[select-2]{1} \\
    1 \\ 1 \\
    L
  \end{pmatrix}
%
\tikz[remember picture,overlay]
\draw[decorate,decoration={brace,amplitude=3pt},]
  ([xshift=6mm]select-1.north east)
  -- node[right=3pt]{$\sum \gamma_t^k \leq 1$}
  ([xshift=6mm]select-2.south east);
\]
\end{document}