Tikz: error when using beamer-class but not when using article-class

Question

I'm using Overleaf to build a beamer presentation and wanted to add rectangles around cells in table (as described in this other question/answer by barbara beeton). Unfortunately, I get error messages and disaligned rectangles when I try to implement it in beamer, inside the frame environment.

Here it is a minimal working example using the article class:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,fit}
\begin{document}
    \begin{tikzpicture}
          \matrix (M) [%
            matrix of nodes, column sep=1cm, row sep=1cm
          ]
          {%
             A1& B1 \\
             A2& B2 \\
         };
        \node[draw=blue,rounded corners = 1ex,fit=(M-1-1)(M-2-1),inner sep = 0pt] {};
    \end{tikzpicture}
\end{document}

Here it is a minimal working example using the beamer class:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,fit}
\begin{document}
% \begin{frame}{Frame Title}
    \begin{tikzpicture}
          \matrix (M) [%
            matrix of nodes, column sep=1cm, row sep=1cm
          ]
          {%
             A1& B1 \\
             A2& B2 \\
         };
        \node[draw=blue,rounded corners = 1ex,fit=(M-1-1)(M-2-1),inner sep = 0pt] {};
    \end{tikzpicture}
% \end{frame}
\end{document}

However, if I uncomment the frame environment the code does not compile properly anymore. The following is the problematic code:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,fit}
\begin{document}
\begin{frame}{Frame Title}
    \begin{tikzpicture}
          \matrix (M) [%
            matrix of nodes, column sep=1cm, row sep=1cm
          ]
          {%
             A1& B1 \\
             A2& B2 \\
         };
        \node[draw=blue,rounded corners = 1ex,fit=(M-1-1)(M-2-1),inner sep = 0pt] {};
    \end{tikzpicture}
\end{frame}
\end{document}

Thanks a lot for helping!

You didn't say which error, is it this one? https://tex.stackexchange.com/questions/15093/single-ampersand-used-with-wrong-catcode-error-using-tikz-matrix-in-beamer — Torbjørn T., Oct 19 '19 at 17:48
Alternatively https://tex.stackexchange.com/questions/208408/tikz-matrix-undefined-control-sequence — Torbjørn T., Oct 19 '19 at 18:22
It's the second error, that is: ! Undefined control sequence. \pgf@matrix@last@nextcell@options — GabMac, Oct 19 '19 at 20:32
You should realize that beamer and article have almost nothing in common. — John Kormylo, Oct 20 '19 at 02:03

Zarko · Accepted Answer · 2019-10-19T18:43:35.947

4

You need to add option fragile to frame:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{arrows,fit, matrix, shapes,}

\begin{document}
\begin{frame}[fragile]% <---
\frametitle{Frame Title}
    \begin{tikzpicture}
          \matrix (M) [
            matrix of nodes, column sep=1cm, row sep=1cm
          ]
          {
             A1& B1 \\
             A2& B2 \\
         };
        \node[draw=blue,rounded corners = 1ex,fit=(M-1-1)(M-2-1),inner sep = 0pt] {};
    \end{tikzpicture}
\end{frame}
\end{document}

edited Oct 19 '19 at 18:43

answered Oct 19 '19 at 18:02

Zarko

296,517

Why do you think those options have anything to with it? With or without them, the error is the same. See e.g. the question I linked to above or https://tex.stackexchange.com/questions/208408/tikz-matrix-undefined-control-sequence – Torbjørn T. Oct 19 '19 at 18:21
@TorbjørnT., because with fragile it works fine (no errors). Frankly said, it might be, that I confused something, i.e. that actually problem is with ampersands. – Zarko Oct 19 '19 at 18:40
You didn't understand what I said. In your answer you say that fragile is required because of matrix of nodes, column sep=1cm, row sep=1cm. That is wrong. – Torbjørn T. Oct 19 '19 at 18:42
@TorbjørnT., i delete this part of explanation, I need to check again some my older solution of similar problems. – Zarko Oct 19 '19 at 18:44

Tikz: error when using beamer-class but not when using article-class

1 Answers1