删除矩阵内行分隔符

Question

我有以下代码

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}[cell/.style={rectangle,draw=black}, nodes in empty cells]
  \matrix[
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  nodes={anchor=center, minimum width=2cm, cell},
  column 1/.style = {nodes={minimum width=2cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  row 6/.style = {text height=1.3ex, text depth=0},
  ] (m)
  { \\
    \\
    \\
    i \mapsto 5 \\
    \\
    \\
  };
\end{tikzpicture}

它产生这个矩阵：

有人知道如何移除所有内行分隔符（或给它们上色white以不改变高度）吗？我只想让文本被大矩形包围。

编辑1：

我按照第一条评论的第一个解决方案（draw从cell样式选项中删除并将其用于\matrix），并尝试通过更改为来用颜色填充它column 1/.style = {nodes={minimum width=2cm, fill=purple}},，它显示以下内容。但是，我希望背景颜色填充整个矩形。

我坚持使用矩阵的原因是因为这个 tikz 图片将与其他具有矩阵（6 行，height=1.3ex）的图片对齐。我希望它们具有相同的高度。这就是为什么我认为将行分隔符的颜色更改为white可能是一个很好的解决方案...

编辑2：

我认为我需要更清楚地说明我的需求...这是生成两个并排矩阵的代码。左侧的矩阵是参考矩阵；右侧的矩阵遵循第一条注释的解决方案。我只想让它们具有相同的高度：一个有内行分隔，另一个没有内行分隔，并用紫色填充。

\begin{frame}
\begin{tikzpicture}[cell/.style={rectangle,draw=black}, nodes in empty cells]
  \matrix[
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  nodes={anchor=center, minimum width=2cm, cell},
  column 1/.style = {nodes={minimum width=1.5cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  ] (m)
  { \\ \\ i \mapsto 5 \\ \\ \\ };
\end{tikzpicture}
\begin{tikzpicture}[cell/.style={rectangle}, nodes in empty cells]
  \matrix[
  matrix,
  fill=purple,
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  nodes={anchor=center, minimum width=2cm, cell},
  column 1/.style = {nodes={minimum width=1.5cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  ] (m)
  { \\ \\ i \mapsto 5 \\ \\ \\ };
\end{tikzpicture}
\end{frame}

Answer 1

您可以draw从cell样式选项中删除它，并将其用于\matrix（见下文）；但是，使用它似乎有点小题大做，因为一个简单的方法\node可以用更少的努力完成同样的工作，如下所示：

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}[cell/.style={rectangle}, nodes in empty cells]
  \matrix[
  draw,
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  nodes={anchor=center, minimum width=2cm, cell},
  column 1/.style = {nodes={minimum width=2cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  row 6/.style = {text height=1.3ex, text depth=0},
  ] (m)
  { \\
    \\
    \\
    i \mapsto 5 \\
    \\
    \\
  };
\end{tikzpicture}

\begin{tikzpicture}[cell/.style={rectangle}, nodes in empty cells]
  \node[
  draw,
  text width=2cm,minimum height=3cm,align=center] (m)
  {$i \mapsto 5$};
\end{tikzpicture}

\end{document}

更新：

杀死但保留里面的节点inner sep：\matrix

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{calc,matrix}

\colorlet{mycolor}{gray!10}

\begin{document}

\begin{frame}

\begin{tikzpicture}[cell/.style={rectangle,draw=black}, nodes in empty cells,baseline]
  \matrix[
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  nodes={anchor=center,cell},
  column 1/.style = {nodes={minimum width=1.5cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  ] (m)
  { \\ \\ i \mapsto 5 \\ \\ \\ };
\end{tikzpicture}
\begin{tikzpicture}[cell/.style={rectangle,inner sep=0.3333em,draw},nodes in empty cells,baseline]
  \matrix[
  matrix,
  nodes={anchor=center, minimum width=2cm, cell},
  inner sep=0em,
  fill=purple,
  matrix of math nodes,
  row sep =-\pgflinewidth,
  column sep = -\pgflinewidth,
  column 1/.style = {nodes={minimum width=1.5cm}},
  row 1/.style = {nodes={text height=1.3ex, text depth=0}},
  row 2/.style = {text height=1.3ex, text depth=0},
  row 3/.style = {text height=1.3ex, text depth=0},
  row 4/.style = {text height=1.3ex, text depth=0},
  row 5/.style = {text height=1.3ex, text depth=0},  
  ] (m)
  { \\ \\ i \mapsto 5 \\ \\ \\ };
\end{tikzpicture}
\end{frame}

\end{document}