multirow in tikz matrix

Question

I am trying to insert a multirow in a tikz matrix with a grid, so:

\documentclass{amsart} 
\usepackage{tikz}
\usetikzlibrary{matrix,fit}

\begin{document} 
\begin{tikzpicture}
\matrix (table) [%
  matrix of nodes,
  nodes in empty cells,
  draw,
  inner sep=0mm,
  minimum size=7mm
  ] {%
  \node[draw] {A}; & \node[draw] {B}; & \node[draw] {C}; & \node[draw] {D}; \\
  \node[draw] {E}; &   &   & \node[draw] {G}; \\   };
\node[draw,fit=(table-2-2)(table-2-3)]{F};
\end{tikzpicture}
\end{document}

With ugly results. Is there a way to fix this? A better way to implement it? Thanks.

Answer 1

You have better control over the borders of your cells if you explicitly set the text height and depth. Furthermore, I would use styles to keep the code more maintainable. Here's an example of how your table could be implemented, based on the code used in " coloring every other row of a table, with vertical lines ".

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix,fit}
\begin{document}

\tikzset{
    table nodes/.style={
        rectangle,
        draw=black,
        align=center,
        minimum height=7mm,
        text depth=0.5ex,
        text height=2ex,
        inner xsep=0pt,
        outer sep=0pt
    },      
    table/.style={
        matrix of nodes,
        row sep=-\pgflinewidth,
        column sep=-\pgflinewidth,
        nodes={
            table nodes
        },
        execute at empty cell={\node[draw=none]{};}
    }
}
\begin{tikzpicture}

\matrix (first) [table,text width=7mm,name=table]
{
A   & B & C & D\\
E   &   &   & F\\
};
\node[draw,fit=(table-2-2)(table-2-3),table nodes]{F};


\end{tikzpicture}
\end{document}